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/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 5f67e33..ff987ed 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -535,6 +535,13 @@
 	help
 	  This SD/MMC controller is present in Andestech SoCs which is based on Faraday IP.
 
+config FTSDC010_SDIO
+	bool "Support ftsdc010 sdio"
+	default n
+	depends on FTSDC010
+	help
+		This can enable ftsdc010 sdio function.
+
 endif
 
 config TEGRA124_MMC_DISABLE_EXT_LOOPBACK