[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>
diff --git a/drivers/Makefile b/drivers/Makefile
index a47d248..6771177 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -77,4 +77,4 @@
 obj-$(CONFIG_SUPERH)		+= sh/
 obj-$(CONFIG_GENERIC_TIME)	+= clocksource/
 obj-$(CONFIG_DMA_ENGINE)	+= dma/
-obj-$(CONFIG_PS3)		+= ps3/
+obj-$(CONFIG_PPC_PS3)		+= ps3/