[atomicsabi64] Cleanup atomics (#350)

Fix LDADD operand order, spelling mistakes, improve indentation.

Co-authored-by: Wilco Dijkstra <[email protected]>

Author: Wilco1

atomicsabi64/atomicsabi64.rst

@@ -491,7 +491,7 @@ returned in ``W0``.
   |                                     +---------------+--------------------------------------+
   |                                     | ``FEAT_LSE``  | .. code-block:: none                 |
   |                                     |               |                                      |
-  |                                     |               |    SWAL   W2, W0, [X1] *             |
+  |                                     |               |    SWPAL  W2, W0, [X1] *             |
   +-------------------------------------+---------------+--------------------------------------+
   | ``fetch_add(loc,val,relaxed)``      | ``Armv8-A``   | .. code-block:: none                 |
   |                                     |               |                                      |
@@ -503,7 +503,7 @@ returned in ``W0``.
   |                                     +---------------+--------------------------------------+
   |                                     | ``FEAT_LSE``  | .. code-block:: none                 |
   |                                     |               |                                      |
-  |                                     |               |    LDADD  W0, W2, [X1] *             |
+  |                                     |               |    LDADD   W2, W0, [X1] *            |
   +-------------------------------------+---------------+--------------------------------------+
   | ``fetch_add(loc,val,acquire)``      | ``Armv8-A``   | .. code-block:: none                 |
   |                                     |               |                                      |
@@ -515,7 +515,7 @@ returned in ``W0``.
   |                                     +---------------+--------------------------------------+
   |                                     | ``FEAT_LSE``  | .. code-block:: none                 |
   |                                     |               |                                      |
-  |                                     |               |    LDADDA W0, W2, [X1] *             |
+  |                                     |               |    LDADDA  W2, W0, [X1] *            |
   +-------------------------------------+---------------+--------------------------------------+
   | ``fetch_add(loc,val,release)``      | ``Armv8-A``   | .. code-block:: none                 |
   |                                     |               |                                      |
@@ -527,7 +527,7 @@ returned in ``W0``.
   |                                     +---------------+--------------------------------------+
   |                                     | ``FEAT_LSE``  | .. code-block:: none                 |
   |                                     |               |                                      |
-  |                                     |               |    LDADDL W0, W2, [X1] *             |
+  |                                     |               |    LDADDL  W2, W0, [X1] *            |
   +-------------------------------------+---------------+--------------------------------------+
   | ``fetch_add(loc,val,acq_rel)``      | ``Armv8-A``   | .. code-block:: none                 |
   | ``fetch_add(loc,val,seq_cst)``      |               |                                      |
@@ -539,7 +539,7 @@ returned in ``W0``.
   |                                     +---------------+--------------------------------------+
   |                                     | ``FEAT_LSE``  | .. code-block:: none                 |
   |                                     |               |                                      |
-  |                                     |               |    LDADDAL W0, W2, [X1] *            |
+  |                                     |               |    LDADDAL W2, W0, [X1] *            |
   +-------------------------------------+---------------+--------------------------------------+
   | ``compare_exchange_strong(``        | ``Armv8-A``   | .. code-block:: none                 |
   |   ``loc,exp,val,relaxed,relaxed)``  |               |                                      |
@@ -713,7 +713,7 @@ compare-exchange. The result is returned in ``X0`` and ``X1``.
   |                                     +---------------+--------------------------------------+
   |                                     |``FEAT_LRCPC3``| .. code-block:: none                 |
   |                                     |               |                                      |
-  |                                     |               |    STILP   x2, X3, [X4]              |
+  |                                     |               |    STILP   X2, X3, [X4]              |
   +-------------------------------------+---------------+--------------------------------------+
   | ``load(loc,relaxed)``               | ``Armv8-A``   | .. code-block:: none                 |
   |                                     |               |                                      |