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/board/freescale/p2020ds/ddr.c b/board/freescale/p2020ds/ddr.c
index b12141f..debe70b 100644
--- a/board/freescale/p2020ds/ddr.c
+++ b/board/freescale/p2020ds/ddr.c
@@ -8,8 +8,8 @@
 
 #include <common.h>
 
-#include <asm/fsl_ddr_sdram.h>
-#include <asm/fsl_ddr_dimm_params.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
 
 struct board_specific_parameters {
 	u32 n_ranks;
@@ -37,7 +37,7 @@
 	 *   num|  hi|  clk| cpo|wrdata|2T
 	 * ranks| mhz|adjst|    | delay|
 	 */
-#ifdef CONFIG_FSL_DDR2
+#ifdef CONFIG_SYS_FSL_DDR2
 	{2,  549,    4,   0x1f,    2,  0},
 	{2,  680,    4,   0x1f,    3,  0},
 	{2,  850,    4,   0x1f,    4,  0},