mmc: ftsdc010: Migrate CONFIG_FTSDC010_SDIO to Kconfig

Convert CONFIG_FTSDC010_SDIO to Kconfig.
So CONFIG_FTSDC010_SDIO can also be
removed from config_whitelist.txt.

Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Cc: Greentime Hu <green.hu@gmail.com>
diff --git a/configs/nx25-ae250_defconfig b/configs/nx25-ae250_defconfig
index 47b83db..ab88910 100644
--- a/configs/nx25-ae250_defconfig
+++ b/configs/nx25-ae250_defconfig
@@ -24,6 +24,7 @@
 CONFIG_DM_MMC=y
 CONFIG_MMC_NDS32=y
 CONFIG_FTSDC010=y
+CONFIG_FTSDC010_SDIO=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_MACRONIX=y