cmd/compile/internal/abi: fix typo in comment

Change-Id: I196045314b2b0e908d7b31ac0cea5b25404f3ee0
Reviewed-on: https://go-review.googlesource.com/c/go/+/325249
Reviewed-by: Matthew Dempsky <[email protected]>
Trust: Keith Randall <[email protected]>

Author: sryoya

src/cmd/compile/internal/abi/abiutils.go

@@ -449,7 +449,7 @@ func (config *ABIConfig) ABIAnalyze(t *types.Type, setNname bool) *ABIParamResul
 // parameterUpdateMu protects the Offset field of function/method parameters (a subset of structure Fields)
 var parameterUpdateMu sync.Mutex
 
-// FieldOffsetOf returns a concurency-safe version of f.Offset
+// FieldOffsetOf returns a concurrency-safe version of f.Offset
 func FieldOffsetOf(f *types.Field) int64 {
 	parameterUpdateMu.Lock()
 	defer parameterUpdateMu.Unlock()