Replace "#include <asm-$ARCH/$FILE>" with "#include <asm/$FILE>"

The appropriate include/asm-$ARCH directory should already by symlinked
to include/asm so using the whole "asm-$ARCH" path is unnecessary.

This change should also allow us to move the include/asm-$ARCH
directories into their appropriate lib/$ARCH/ directories.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/cpu/ppc4xx/4xx_pcie.c b/cpu/ppc4xx/4xx_pcie.c
index f3b9214..10b58b7 100644
--- a/cpu/ppc4xx/4xx_pcie.c
+++ b/cpu/ppc4xx/4xx_pcie.c
@@ -29,7 +29,7 @@
 #include <pci.h>
 #include <ppc4xx.h>
 #include <asm/processor.h>
-#include <asm-ppc/io.h>
+#include <asm/io.h>
 #include <asm/errno.h>
 
 #if (defined(CONFIG_440SPE) || defined(CONFIG_405EX) ||	\