linaro/configs: arndale_octa: Enable iommu support

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
diff --git a/linaro/configs/arndale_octa.conf b/linaro/configs/arndale_octa.conf
index 59a213f..7be71b9 100644
--- a/linaro/configs/arndale_octa.conf
+++ b/linaro/configs/arndale_octa.conf
@@ -41,6 +41,7 @@
 CONFIG_DRM=y
 CONFIG_DRM_LOAD_EDID_FIRMWARE=y
 CONFIG_DRM_EXYNOS=y
+CONFIG_DRM_EXYNOS_IOMMU=y
 CONFIG_DRM_EXYNOS_DMABUF=y
 CONFIG_DRM_EXYNOS_HDMI=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
@@ -72,6 +73,8 @@
 CONFIG_MMC_DW_EXYNOS=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_S3C=y
+CONFIG_EXYNOS_IOMMU=y
+CONFIG_EXYNOS_IOMMU_DEBUG=y
 CONFIG_EXTCON=y
 CONFIG_DEBUG_KERNEL=y
 CONFIG_DETECT_HUNG_TASK=y