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

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/amcc/kilauea/u-boot-nand.lds b/board/amcc/kilauea/u-boot-nand.lds
index 738caa0..bfca582 100644
--- a/board/amcc/kilauea/u-boot-nand.lds
+++ b/board/amcc/kilauea/u-boot-nand.lds
@@ -53,7 +53,7 @@
     /* WARNING - the following is hand-optimized to fit within	*/
     /* the sector layout of our flash chips!	XXX FIXME XXX	*/
 
-    cpu/ppc4xx/start.o	(.text)
+    arch/ppc/cpu/ppc4xx/start.o	(.text)
 
     /* Align to next NAND block */
     . = ALIGN(0x4000);