mmc: mv_sdhci: Depend on DM_MMC

All build targets using this driver already use DM_MMC. So let's depend
this driver on this Kconfig symbol and remove the non-DM driver part.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 80641e1..59fb0fb 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -621,6 +621,7 @@
 	bool "SDHCI support on Marvell platform"
 	depends on ARCH_MVEBU
 	depends on MMC_SDHCI
+	depends on DM_MMC
 	help
 	  This selects the Secure Digital Host Controller Interface on
 	  Marvell platform.