[POWERPC] Change include protections to ASM_POWERPC

Change several headers in include/asm-powerpc that currently use some variation
of ASM_PPC to use ASM_POWERPC instead.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/asm-powerpc/unistd.h b/include/asm-powerpc/unistd.h
index 21f004a..908dfe4 100644
--- a/include/asm-powerpc/unistd.h
+++ b/include/asm-powerpc/unistd.h
@@ -1,5 +1,5 @@
-#ifndef _ASM_PPC_UNISTD_H_
-#define _ASM_PPC_UNISTD_H_
+#ifndef _ASM_POWERPC_UNISTD_H_
+#define _ASM_POWERPC_UNISTD_H_
 
 /*
  * This file contains the system call numbers.
@@ -381,4 +381,4 @@
 #endif		/* __ASSEMBLY__ */
 #endif		/* __KERNEL__ */
 
-#endif /* _ASM_PPC_UNISTD_H_ */
+#endif /* _ASM_POWERPC_UNISTD_H_ */