fsl_ddr: Move DDR config options to driver Kconfig

Create driver/ddr/fsl/Kconfig and move existing options. Clean up
existing macros.

Signed-off-by: York Sun <york.sun@nxp.com>
[trini: Migrate sbc8641d, xpedite537x and MPC8536DS, run a moveconfig.py -s]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/ddr/fsl/Makefile b/drivers/ddr/fsl/Makefile
index 00dea42..7935f7d 100644
--- a/drivers/ddr/fsl/Makefile
+++ b/drivers/ddr/fsl/Makefile
@@ -30,7 +30,7 @@
 obj-$(CONFIG_SYS_FSL_DDRC_GEN1)	+= mpc85xx_ddr_gen1.o
 obj-$(CONFIG_SYS_FSL_DDRC_GEN2)	+= mpc85xx_ddr_gen2.o
 obj-$(CONFIG_SYS_FSL_DDRC_GEN3)	+= mpc85xx_ddr_gen3.o
-obj-$(CONFIG_SYS_FSL_DDR_86XX)		+= mpc86xx_ddr.o
+obj-$(CONFIG_SYS_FSL_DDRC_86XX_GEN2)	+= mpc86xx_ddr.o
 obj-$(CONFIG_SYS_FSL_DDRC_ARM_GEN3)	+= arm_ddr_gen3.o
 obj-$(CONFIG_SYS_FSL_DDRC_GEN4) += fsl_ddr_gen4.o
 obj-$(CONFIG_SYS_FSL_MMDC) += fsl_mmdc.o