mmc: uniphier-sd: migrate to CONFIG_BLK

This is the state-of-the-art MMC driver implementation.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index a71afa5..ba9a723 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -80,6 +80,7 @@
 config MMC_UNIPHIER
 	bool "UniPhier SD/MMC Host Controller support"
 	depends on ARCH_UNIPHIER
+	depends on BLK
 	select DM_MMC_OPS
 	help
 	  This selects support for the SD/MMC Host Controller on UniPhier SoCs.