powerpc: Use __REF macro instead of old .text.init.refok.

The section .text.init.refok is deprecated and __REF (.ref.text)
should be used in assembly files instead.  This patch cleans up a few
uses of .text.init.refok in the powerpc architecture.
Signed-off-by: Tim Abbott <tabbott@mit.edu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/powerpc/include/asm/ppc_asm.h

@@ -4,6 +4,7 @@
 #ifndef _ASM_POWERPC_PPC_ASM_H
 #define _ASM_POWERPC_PPC_ASM_H
 
+#include <linux/init.h>
 #include <linux/stringify.h>
 #include <asm/asm-compat.h>
 #include <asm/processor.h>
@@ -189,7 +190,7 @@ name: \
 GLUE(.,name):
 
 #define _INIT_GLOBAL(name) \
-	.section ".text.init.refok"; \
+	__REF; \
 	.align 2 ; \
 	.globl name; \
 	.globl GLUE(.,name); \
@@ -229,7 +230,7 @@ name: \
 GLUE(.,name):
 
 #define _INIT_STATIC(name) \
-	.section ".text.init.refok"; \
+	__REF; \
 	.align 2 ; \
 	.section ".opd","aw"; \
 name: \