[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>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 26126d27d756..45e86c751f11 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -14,6 +14,11 @@ config 64BIT
         bool
         default y if PPC64
 
+config WORD_SIZE
+        int
+        default 64 if PPC64
+        default 32 if !PPC64
+
 config PPC_MERGE
         def_bool y