Currently, PF driver will report lsc when it detects the link status
change, it's not a generic implementation.
We refactor PF lsc event report by following scheme:
1. PF driver marks RTE_PCI_DRV_INTR_LSC in rte_pci_driver by default.
2. In the init stage, PF driver will detect whether firmware supports
lsc interrupt or not, driver will clear RTE_ETH_DEV_INTR_LSC flag if
firmware doesn't support lsc interrupt.
3. PF driver will report lsc event only when dev_conf.intr_conf.lsc is
set.
Note: If the firmware supports lsc interrupt, we also keep periodic
polling to deal with the interrupt loss.
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
3b37cbe617