powerpc: Remove <common.h> and add needed includes

Remove <common.h> from all powerpc architecture files and when needed add
missing include files directly. This typically involves using
<asm/u-boot.h> instead due to the difficult nested structure of the
PowerPC includes themselves.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/fsl_immap.h b/include/fsl_immap.h
index 5297c0b..54d6e0a 100644
--- a/include/fsl_immap.h
+++ b/include/fsl_immap.h
@@ -7,6 +7,9 @@
 
 #ifndef __FSL_IMMAP_H
 #define __FSL_IMMAP_H
+
+#include <linux/types.h>
+
 /*
  * DDR memory controller registers
  * This structure works for mpc83xx (DDR2 and DDR3), mpc85xx, mpc86xx.