arm64: defconfig: Enable Cadence MACB/GEM support

This patch enables the cadence MACB/GEM support that is needed
by lg1k SoCs.
Signed-off-by: NChanho Min <chanho.min@lge.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

arch/arm64/configs/defconfig

@@ -120,6 +120,7 @@ CONFIG_TUN=y
 CONFIG_VIRTIO_NET=y
 CONFIG_AMD_XGBE=y
 CONFIG_NET_XGENE=y
+CONFIG_MACB=y
 CONFIG_E1000E=y
 CONFIG_IGB=y
 CONFIG_IGBVF=y