ppc64: merge binfmt_elf32.c

and use start_thread for both 32 and 64 bit bineries.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index f03f6d4..adac749 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -11,6 +11,7 @@
 endif
 
 obj-y				:= semaphore.o cputable.o
+obj-$(CONFIG_PPC64)		+= binfmt_elf32.o
 obj-$(CONFIG_ALTIVEC)		+= vecemu.o vector.o
 obj-$(CONFIG_POWER4)		+= idle_power4.o