net: hns3: add hns3_state_init() to do state initialization

mainline inclusion
from mainline-v5.15-rc1
commit c511dfff
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4BY3P
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c511dfff4b655685d7341962a76d9a340150e0ac



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To improve the readability and maintainability, add hns3_state_init() to
initialize the state, and this new function will be used to add more state
initialization in the future.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Yongxin Li <liyongxin1@huawei.com>
Signed-off-by: Junxin Chen <chenjunxin1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>