mmc: actions: add MMC driver for Actions OWL S700/S900

This commit adds support for MMC controllers found on Actions OWL
SoC platform(S700/S900).

Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index e0927ce..f04cc44 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -295,6 +295,13 @@
 
 	  If unsure, say N.
 
+config MMC_OWL
+	bool "Actions OWL Multimedia Card Interface support"
+	depends on ARCH_OWL && DM_MMC && BLK
+	help
+	  This selects the OWL SD/MMC host controller found on board
+	  based on Actions S700/S900 SoC.
+
 config MMC_MXS
 	bool "Freescale MXS Multimedia Card Interface support"
 	depends on MX23 || MX28 || MX6 || MX7