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/smdk5420_defconfig b/configs/smdk5420_defconfig
index a96b368..1561f6a 100644
--- a/configs/smdk5420_defconfig
+++ b/configs/smdk5420_defconfig
@@ -8,3 +8,9 @@
 CONFIG_SPI_FLASH=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
+CONFIG_CMD_NET=y
+CONFIG_DM_I2C=y
+CONFIG_DM_I2C_COMPAT=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_REGULATOR=y
+CONFIG_VIDEO_BRIDGE=y