[POWERPC] ps3: Missed renames of CONFIG_PS3 to CONFIG_PPC_PS3

When renaming CONFIG_PS3 to CONFIG_PPC_PS3, a few occurrences have been
missed.

I also fixed up the alignment in arch/powerpc/platforms/Makefile.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

include/asm-powerpc/firmware.h

@@ -67,7 +67,7 @@ enum {
 #ifdef CONFIG_PPC_ISERIES
 		FW_FEATURE_ISERIES_POSSIBLE |
 #endif
-#ifdef CONFIG_PS3
+#ifdef CONFIG_PPC_PS3
 		FW_FEATURE_PS3_POSSIBLE |
 #endif
 		0,
@@ -78,7 +78,7 @@ enum {
 #ifdef CONFIG_PPC_ISERIES
 		FW_FEATURE_ISERIES_ALWAYS &
 #endif
-#ifdef CONFIG_PS3
+#ifdef CONFIG_PPC_PS3
 		FW_FEATURE_PS3_ALWAYS &
 #endif
 		FW_FEATURE_POSSIBLE,