runtime: clean atomic_loong64.s of unnecessary package references

The symbols are all defined within the same file, no need
to reference through package names.

Change-Id: I81c27831e85666ebd26d346aeb8f023e52d98acc
Reviewed-on: https://go-review.googlesource.com/c/go/+/479497
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>

Author: abner-chenc

src/runtime/internal/atomic/atomic_loong64.s

@@ -89,7 +89,7 @@ TEXT ·Xaddint64(SB), NOSPLIT, $0-24
 //	} else
 //		return 0;
 TEXT ·Casp1(SB), NOSPLIT, $0-25
-	JMP runtime∕internal∕atomic·Cas64(SB)
+	JMP	·Cas64(SB)
 
 // uint32 xadd(uint32 volatile *ptr, int32 delta)
 // Atomically:
@@ -294,13 +294,13 @@ TEXT ·Loadp(SB),NOSPLIT|NOFRAME,$0-16
 
 // uint32 runtime∕internal∕atomic·LoadAcq(uint32 volatile* ptr)
 TEXT ·LoadAcq(SB),NOSPLIT|NOFRAME,$0-12
-	JMP	atomic·Load(SB)
+	JMP	·Load(SB)
 
 // uint64 ·LoadAcq64(uint64 volatile* ptr)
 TEXT ·LoadAcq64(SB),NOSPLIT|NOFRAME,$0-16
-	JMP	atomic·Load64(SB)
+	JMP	·Load64(SB)
 
 // uintptr ·LoadAcquintptr(uintptr volatile* ptr)
 TEXT ·LoadAcquintptr(SB),NOSPLIT|NOFRAME,$0-16
-	JMP     atomic·Load64(SB)
+	JMP	·Load64(SB)