[dev.power64] reflect: fix asm on power64x

reflect/asm_power64x.s was missing changes made to other
platforms for stack maps.  This CL ports those changes.  With
this fix, the reflect test passes on power64x.

LGTM=rsc
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/170870043

src/reflect/asm_power64x.s

@@ -5,12 +5,14 @@
 // +build power64 power64le
 
 #include "textflag.h"
+#include "funcdata.h"
 
 // makeFuncStub is the code half of the function returned by MakeFunc.
 // See the comment on the declaration of makeFuncStub in makefunc.go
 // for more details.
-// No argsize here, gc generates argsize info at call site.
+// No arg size here, runtime pulls arg map out of the func value.
 TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$16
+	NO_LOCAL_POINTERS
 	MOVD	R11, 8(R1)
 	MOVD	$argframe+0(FP), R3
 	MOVD	R3, 16(R1)
@@ -20,8 +22,9 @@ TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$16
 // methodValueCall is the code half of the function returned by makeMethodValue.
 // See the comment on the declaration of methodValueCall in makefunc.go
 // for more details.
-// No argsize here, gc generates argsize info at call site.
+// No arg size here; runtime pulls arg map out of the func value.
 TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$16
+	NO_LOCAL_POINTERS
 	MOVD	R11, 8(R1)
 	MOVD	$argframe+0(FP), R3
 	MOVD	R3, 16(R1)