ARM: exynos_defconfig: Enable rtl8152 ethernet driver for Odroid-XU4

Odroid-XU4 has a RTL8153-CG gigabit Ethernet adapter, connected over
USB 3.0.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig
index 5aad617..7172e96 100644
--- a/arch/arm/configs/exynos_defconfig
+++ b/arch/arm/configs/exynos_defconfig
@@ -61,6 +61,7 @@
 CONFIG_DM_CRYPT=m
 CONFIG_NETDEVICES=y
 CONFIG_SMSC911X=y
+CONFIG_USB_RTL8152=y
 CONFIG_USB_USBNET=y
 CONFIG_USB_NET_SMSC75XX=y
 CONFIG_USB_NET_SMSC95XX=y