Driver/DDR: Moving Freescale DDR driver to a common driver

Freescale DDR driver has been used for mpc83xx, mpc85xx, mpc86xx SoCs.
The similar DDR controllers will be used for ARM-based SoCs.

Signed-off-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/xpedite550x.h b/include/configs/xpedite550x.h
index 4137cc9..2328c7a 100644
--- a/include/configs/xpedite550x.h
+++ b/include/configs/xpedite550x.h
@@ -49,7 +49,7 @@
 /*
  * DDR config
  */
-#define CONFIG_FSL_DDR3
+#define CONFIG_SYS_FSL_DDR3
 #define CONFIG_SPD_EEPROM		/* Use SPD EEPROM for DDR setup */
 #define CONFIG_DDR_SPD
 #define CONFIG_MEM_INIT_VALUE		0xdeadbeef