ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/mucmc52/config.mk b/board/mucmc52/config.mk
index 90d9ce2..4e9ee73 100644
--- a/board/mucmc52/config.mk
+++ b/board/mucmc52/config.mk
@@ -42,4 +42,4 @@
 endif
 
 PLATFORM_CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) -I$(TOPDIR)/board
-LDSCRIPT := $(SRCTREE)/cpu/mpc5xxx/u-boot.lds
+LDSCRIPT := $(SRCTREE)/arch/ppc/cpu/mpc5xxx/u-boot.lds