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/configs/ls1043aqds_nor_ddr3_defconfig b/configs/ls1043aqds_nor_ddr3_defconfig
index 454701a..5aa058b 100644
--- a/configs/ls1043aqds_nor_ddr3_defconfig
+++ b/configs/ls1043aqds_nor_ddr3_defconfig
@@ -1,6 +1,5 @@
 CONFIG_ARM=y
 CONFIG_TARGET_LS1043AQDS=y
-CONFIG_SYS_FSL_DDR3=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1043a-qds-duart"
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
@@ -24,6 +23,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
 CONFIG_DM=y
+CONFIG_SYS_FSL_DDR3=y
 CONFIG_SPI_FLASH=y
 CONFIG_PCI=y
 CONFIG_SYS_NS16550=y