arm64: defconfig: Enable Cadence MACB/GEM support

This patch enables the cadence MACB/GEM support that is needed
by lg1k SoCs.

Signed-off-by: Chanho Min <chanho.min@lge.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index fd2d74d..4edbbac 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -120,6 +120,7 @@
 CONFIG_VIRTIO_NET=y
 CONFIG_AMD_XGBE=y
 CONFIG_NET_XGENE=y
+CONFIG_MACB=y
 CONFIG_E1000E=y
 CONFIG_IGB=y
 CONFIG_IGBVF=y