hip04_eth: fix missing error handle for build_skb failed

when build_skb failed, we should goto refill the buffer.

Signed-off-by: Weidong Wang <wangweidong1@huawei.com>
Acked-by: Ding Tainhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>