Refactor stmmac_interrupt() by introducing stmmac_common_interrupt()
so that we prepare the ISR operation to be friendly to MSI later.
Signed-off-by: NOng Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: NVoon Weifeng <weifeng.voon@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>