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

Change-Id: Ic48a756b71a62be1c6c4cfe781c02b89010e2338
GitHub-Last-Rev: 8c0d89b
GitHub-Pull-Request: #75985
Reviewed-on: https://go-review.googlesource.com/c/go/+/713041
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
Auto-Submit: Jorropo <jorropo.pgm@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

Author: callthingsoff

src/cmd/compile/internal/ssa/_gen/RISCV64Ops.go

@@ -99,7 +99,7 @@ func init() {
 		}
 	}
 
-	// Floating pointer registers.
+	// Floating point registers.
 	for r := 32; r <= 63; r++ {
 		mask := addreg(r, "")
 		fpMask |= mask