rockchip: firefly-rk3399: enable dwmmc driver for the board

Enable mmc_dw_rockchip driver, disable CONFIG_SPL_OF_PLATDATA
first for some dependence patches still not merged.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Vagrant Cascadian <vagrant@debian.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

configs/firefly-rk3399_defconfig

@@ -23,7 +23,6 @@ CONFIG_CMD_USB=y
 CONFIG_CMD_TIME=y
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_OF_SPL_REMOVE_PROPS="pinctrl-0 pinctrl-names clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
-CONFIG_SPL_OF_PLATDATA=y
 CONFIG_REGMAP=y
 CONFIG_SPL_REGMAP=y
 CONFIG_SYSCON=y
@@ -33,6 +32,7 @@ CONFIG_SPL_CLK=y
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_SYS_I2C_ROCKCHIP=y
 CONFIG_MMC_DW=y
+CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_ROCKCHIP=y
 CONFIG_DM_ETH=y