MLK-22558 ARM: imx_v6_v7_defconfig: Enable necessary net configs

Enable the necessary net configs:
	CONFIG_IP_MULTICAST
	CONFIG_VLAN_8021Q
	CONFIG_LLC2

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>

arch/arm/configs/imx_v6_v7_defconfig

@@ -61,9 +61,12 @@ CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
 CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
 CONFIG_IP_PNP=y
 CONFIG_IP_PNP_DHCP=y
 CONFIG_NETFILTER=y
+CONFIG_VLAN_8021Q=m
+ONFIG_LLC2=y
 CONFIG_CAN=y
 CONFIG_CAN_FLEXCAN=y
 CONFIG_BT=y