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/reginfo.c b/arch/powerpc/cpu/ppc4xx/reginfo.c
index a975667..88f8429 100644
--- a/arch/powerpc/cpu/ppc4xx/reginfo.c
+++ b/arch/powerpc/cpu/ppc4xx/reginfo.c
@@ -28,7 +28,7 @@
 #include <asm/processor.h>
 #include <asm/io.h>
 #include <asm/ppc4xx-uic.h>
-#include <ppc4xx_enet.h>
+#include <asm/ppc4xx-emac.h>
 
 enum REGISTER_TYPE {
 	IDCR1,	/* Indirectly Accessed DCR via SDRAM0_CFGADDR/SDRAM0_CFGDATA */