ARM: multi_v7_defconfig: enable CONFIG_MMC_DW_ROCKCHIP

Allows booting from SD/MMC on RK3288 and other platforms. Added here so I
can enable the board in the boot farm.

Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 491b7d5..709ecc9 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -353,6 +353,7 @@
 CONFIG_MMC_SUNXI=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_EXYNOS=y
+CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=y
 CONFIG_LEDS_GPIO=y