[POWERPC] Create and use CONFIG_WORD_SIZE

Linus made this suggestion for the x86 merge and this starts the process
for powerpc.  We assume that CONFIG_PPC64 implies CONFIG_PPC_MERGE and
CONFIG_PPC_STD_MMU_32 implies CONFIG_PPC_STD_MMU.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/mm/Makefile

@@ -6,13 +6,16 @@ ifeq ($(CONFIG_PPC64),y)
 EXTRA_CFLAGS	+= -mno-minimal-toc
 endif
 
-obj-y				:= fault.o mem.o lmb.o
-obj-$(CONFIG_PPC32)		+= init_32.o pgtable_32.o mmu_context_32.o
+obj-y				:= fault.o mem.o lmb.o \
+				   init_$(CONFIG_WORD_SIZE).o \
+				   pgtable_$(CONFIG_WORD_SIZE).o \
+				   mmu_context_$(CONFIG_WORD_SIZE).o
 hash-$(CONFIG_PPC_NATIVE)	:= hash_native_64.o
-obj-$(CONFIG_PPC64)		+= init_64.o pgtable_64.o mmu_context_64.o \
-				   hash_utils_64.o hash_low_64.o tlb_64.o \
+obj-$(CONFIG_PPC64)		+= hash_utils_64.o \
 				   slb_low.o slb.o stab.o mmap.o $(hash-y)
-obj-$(CONFIG_PPC_STD_MMU_32)	+= ppc_mmu_32.o hash_low_32.o tlb_32.o
+obj-$(CONFIG_PPC_STD_MMU_32)	+= ppc_mmu_32.o
+obj-$(CONFIG_PPC_STD_MMU)	+= hash_low_$(CONFIG_WORD_SIZE).o \
+				   tlb_$(CONFIG_WORD_SIZE).o
 obj-$(CONFIG_40x)		+= 40x_mmu.o
 obj-$(CONFIG_44x)		+= 44x_mmu.o
 obj-$(CONFIG_FSL_BOOKE)		+= fsl_booke_mmu.o