powercp: mpc8xx: move commproc.h

include/commproc.h is dedicated to the 8xx, rename it cpm_8xx.h and
move it into arch/powerpc/include/asm

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
diff --git a/drivers/serial/serial_mpc8xx.c b/drivers/serial/serial_mpc8xx.c
index 26a8085..7a5908f 100644
--- a/drivers/serial/serial_mpc8xx.c
+++ b/drivers/serial/serial_mpc8xx.c
@@ -6,10 +6,10 @@
  */
 
 #include <common.h>
-#include <commproc.h>
 #include <command.h>
 #include <serial.h>
 #include <watchdog.h>
+#include <asm/cpm_8xx.h>
 #include <linux/compiler.h>
 
 DECLARE_GLOBAL_DATA_PTR;