ARM: multi_v7_defconfig: Enable Rockchip display support

Enable options needed for HDMI out on rockchip: DRM driver, Rockchip
DesignWare HDMI glue and the rockchip IOMMU (dependency of the DRM
driver).
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v7_defconfig

@@ -461,6 +461,8 @@ CONFIG_DRM_EXYNOS=m
 CONFIG_DRM_EXYNOS_DSI=y
 CONFIG_DRM_EXYNOS_FIMD=y
 CONFIG_DRM_EXYNOS_HDMI=y
+CONFIG_DRM_ROCKCHIP=m
+CONFIG_ROCKCHIP_DW_HDMI=m
 CONFIG_DRM_RCAR_DU=m
 CONFIG_DRM_TEGRA=y
 CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0=m
@@ -641,6 +643,7 @@ CONFIG_APQ_MMCC_8084=y
 CONFIG_MSM_GCC_8660=y
 CONFIG_MSM_MMCC_8960=y
 CONFIG_MSM_MMCC_8974=y
+CONFIG_ROCKCHIP_IOMMU=y
 CONFIG_TEGRA_IOMMU_GART=y
 CONFIG_TEGRA_IOMMU_SMMU=y
 CONFIG_PM_DEVFREQ=y