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

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/stx/stxxtc/u-boot.lds b/board/stx/stxxtc/u-boot.lds
index ff11ad0..c4df378 100644
--- a/board/stx/stxxtc/u-boot.lds
+++ b/board/stx/stxxtc/u-boot.lds
@@ -52,8 +52,8 @@
   .plt		: { *(.plt)		}
   .text	:
   {
-    cpu/mpc8xx/start.o		(.text)
-    cpu/mpc8xx/traps.o		(.text)
+    arch/ppc/cpu/mpc8xx/start.o		(.text)
+    arch/ppc/cpu/mpc8xx/traps.o		(.text)
     common/dlmalloc.o		(.text)
     arch/ppc/lib/ppcstring.o		(.text)
     lib/vsprintf.o	(.text)