exynos: Enable new features for exynos5 boards

Enable PMICs, regulators and the like so that new drivers will be made
available.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/arndale_defconfig b/configs/arndale_defconfig
index aa489cf..ebac9ad 100644
--- a/configs/arndale_defconfig
+++ b/configs/arndale_defconfig
@@ -13,3 +13,5 @@
 CONFIG_SOUND_WM8994=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
+CONFIG_DM_I2C=y
+CONFIG_DM_I2C_COMPAT=y