ppc64: use copyuser_64.S from powerpc/lib

since it is identical to copyuser.S from ppc64/lib.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 5e48194..3474c93 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -5,12 +5,12 @@
 ifeq ($(CONFIG_PPC_MERGE),y)
 obj-y			:= strcase.o string.o
 obj-$(CONFIG_PPC32)	+= div64.o copy_32.o checksum_32.o
-obj-$(CONFIG_PPC64)	+= copyuser_64.o memcpy_64.o \
+obj-$(CONFIG_PPC64)	+= memcpy_64.o \
 			   usercopy_64.o sstep.o mem_64.o
 ifeq ($(CONFIG_PPC64),y)
 obj-$(CONFIG_SMP)	+= locks.o
 endif
 endif
 
-obj-$(CONFIG_PPC64)	+= checksum_64.o copypage_64.o
+obj-$(CONFIG_PPC64)	+= checksum_64.o copypage_64.o copyuser_64.o
 obj-$(CONFIG_PPC_ISERIES) += e2a.o