mmc: Add JZ47xx SD/MMC controller driver

Add driver for the JZ47xx MSC controller.

Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index fbd1396..496b2cb 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -332,6 +332,12 @@
 
 	  If unsure, say N.
 
+config JZ47XX_MMC
+	bool "Ingenic JZ47xx SD/MMC Host Controller support"
+	depends on ARCH_JZ47XX
+	help
+	  This selects support for the SD Card Controller on Ingenic JZ47xx SoCs.
+
 config MMC_SANDBOX
 	bool "Sandbox MMC support"
 	depends on SANDBOX