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

Remove <common.h> from this driver directory and when needed
add missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/ddr/fsl/util.c b/drivers/ddr/fsl/util.c
index 6005139..0a73170 100644
--- a/drivers/ddr/fsl/util.c
+++ b/drivers/ddr/fsl/util.c
@@ -4,9 +4,10 @@
  * Copyright 2021 NXP
  */
 
-#include <common.h>
+#include <config.h>
 #ifdef CONFIG_PPC
 #include <asm/fsl_law.h>
+#include <asm/ppc.h>
 #endif
 #include <div64.h>
 #include <linux/delay.h>