powerpc: Get 64-bit configs to compile with ARCH=powerpc

This is a bunch of mostly small fixes that are needed to get
ARCH=powerpc to compile for 64-bit.  This adds setup_64.c from
arch/ppc64/kernel/setup.c and locks.c from arch/ppc64/lib/locks.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index a8cedb9..30367a0 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -7,3 +7,7 @@
 obj-$(CONFIG_PPC64)	+= copypage_64.o copyuser_64.o memcpy_64.o \
 			   usercopy_64.o sstep.o checksum_64.o mem_64.o
 obj-$(CONFIG_PPC_ISERIES) += e2a.o
+ifeq ($(CONFIG_PPC64),y)
+obj-$(CONFIG_SMP)	+= locks.o
+endif
+