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/mpc8610hpcd/Makefile b/board/freescale/mpc8610hpcd/Makefile
index 933ea17..2613004 100644
--- a/board/freescale/mpc8610hpcd/Makefile
+++ b/board/freescale/mpc8610hpcd/Makefile
@@ -4,6 +4,6 @@
 #
 
 obj-y	+= mpc8610hpcd.o
-obj-$(CONFIG_FSL_DDR2) += ddr.o
+obj-$(CONFIG_SYS_FSL_DDR2) += ddr.o
 obj-y	+= law.o
 obj-$(CONFIG_FSL_DIU_FB)	+= mpc8610hpcd_diu.o