net: hns3: remove redundant return value of hns3_uninit_all_ring()

mainline inclusion
from mainline-v5.12-rc1-dontuse
commit 64749c9c
category: feature
bugzilla: 173966
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=64749c9c38a9b7f64b83b6970b679f2fb7cd6387



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Since hns3_uninit_all_ring() only returns 0, so remove this
redundant return value and function declaration in hns3_enet.h.

Signed-off-by: Huazhong Tan <tanhuazhong@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>