net: core: use eth_type_vlan in __netif_receive_skb_core

Replace the check for ETH_P_8021Q and ETH_P_8021AD in
__netif_receive_skb_core with eth_type_vlan.

Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn>
Link: https://lore.kernel.org/r/20210111104221.3451-1-dong.menglong@zte.com.cn


Signed-off-by: Jakub Kicinski <kuba@kernel.org>