ppc64: Use merged versions of init_task.c and process.c.

These two files are now built in arch/powerpc/kernel instead of
arch/ppc64/kernel.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index e1db51e..9317953 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -42,7 +42,7 @@
 
 else
 # stuff used from here for ARCH=ppc or ARCH=ppc64
-obj-$(CONFIG_PPC64)		+= traps.o
+obj-$(CONFIG_PPC64)		+= traps.o process.o init_task.o
 
 fpux-$(CONFIG_PPC32)		+= fpu.o
 extra-$(CONFIG_PPC_FPU)		+= $(fpux-y)