x86/x86asm: fix function name in comment

Change-Id: Ie70c842161c96948098082d3c0ff1b026bcfd8de
Reviewed-on: https://go-review.googlesource.com/c/arch/+/579198
Reviewed-by: qiu laidongfeng2 <2645477756@qq.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Run-TryBot: shuang cui <imcusg@gmail.com>

x86/x86asm/ext_test.go

diff --git a/x86/x86asm/ext_test.go b/x86/x86asm/ext_test.go
index e63f113..2e31dd3 100644
--- a/x86/x86asm/ext_test.go
+++ b/x86/x86asm/ext_test.go
@@ -653,7 +653,7 @@
 	}
 }
 
-// enum8bit generates all possible 2-byte sequences, followed by distinctive padding.
+// enum16bit generates all possible 2-byte sequences, followed by distinctive padding.
 func enum16bit(try func([]byte)) {
 	for i := 0; i < 1<<16; i++ {
 		try([]byte{byte(i), byte(i >> 8), 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88})