ppc4xx: Move ppc4xx headers to powerpc include directory

This patch moves some ppc4xx related headers from the common include
directory (include/) to the powerpc specific one
(arch/powerpc/include/asm/). This way to common include directory is not
so cluttered with files.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/powerpc/cpu/ppc4xx/dcr.S b/arch/powerpc/cpu/ppc4xx/dcr.S
index 93465a3..e668e05 100644
--- a/arch/powerpc/cpu/ppc4xx/dcr.S
+++ b/arch/powerpc/cpu/ppc4xx/dcr.S
@@ -24,7 +24,7 @@
 
 #if defined(CONFIG_4xx) && defined(CONFIG_CMD_SETGETDCR)
 
-#include <ppc4xx.h>
+#include <asm/ppc4xx.h>
 
 #define _LINUX_CONFIG_H 1       /* avoid reading Linux autoconf.h file  */