Convert to use fsl_esdhc_imx for i.MX platforms

Converted to use fsl_esdhc_imx for i.MX platforms.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Tested-by: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Martyn Welch <martyn.welch@collabora.com>
Acked-by: Jason Liu <Jason.hui.liu@nxp.com>
diff --git a/configs/riotboard_defconfig b/configs/riotboard_defconfig
index 6b0d7e5..0b6304e 100644
--- a/configs/riotboard_defconfig
+++ b/configs/riotboard_defconfig
@@ -22,7 +22,7 @@
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_DM=y
 CONFIG_SUPPORT_EMMC_BOOT=y
-CONFIG_FSL_ESDHC=y
+CONFIG_FSL_ESDHC_IMX=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=20000000