cmd/asm: fix build error caused by yextractps

Fix ytab table for EXTRACTPS.
Related to https://go-review.googlesource.com/#/c/go/+/63490/.

Change-Id: I11672d6bb731a204a08905f8321450f02c5bed76
Reviewed-on: https://go-review.googlesource.com/68950
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/internal/obj/x86/asm6.go

@@ -889,7 +889,7 @@ var ymmxmm0f38 = []ytab{
 }
 
 var yextractps = []ytab{
-	{Yu2, Yxr, Yml, Zibr_m, 2},
+	{Zibr_m, 2, argList{Yu2, Yxr, Yml}},
 }
 
 /*