[BUG] net: huawei: hinic: a possible sleep-in-atomic-context bug in hinic_get_stats64

The driver may sleep while holding a RCU lock. The function call path (from bottom to top) in Linux-4.17 is: [FUNC] down drivers/net/.../hinic/hinic_main.c, 775: down in hinic_get_stats64 net/core/dev.c, 8278: [FUNC_PTR]hinic_get_stats64 in dev_get_stats net/core/net-sysfs.c, 568: dev_get_stats

[BUG] net: huawei: hinic: a possible sleep-in-atomic-context bug in hinic_get_stats64

The driver may sleep while holding a RCU lock. The function call path (from bottom to top) in Linux-4.17 is: [FUNC] down drivers/net/.../hinic/hinic_main.c, 775: down in hinic_get_stats64 net/core/dev.c, 8278: [FUNC_PTR]hinic_get_stats64 in dev_get_stats net/core/net-sysfs.c, 568: dev_get_stats