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/arch/arm/Kconfig b/arch/arm/Kconfig
index 512e326..498658d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -855,6 +855,7 @@
 
 config ARCH_UNIPHIER
 	bool "Socionext UniPhier SoCs"
+	select BLK
 	select CLK_UNIPHIER
 	select DM
 	select DM_GPIO