net: hns3: remove redundant param to simplify code

mainline inclusion
from mainline-v5.15-rc1
commit 5f22a80f
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=5f22a80f32deed391011f7ab3ce8951ea89282f8

----------------------------------------------------------------------

The param msg_q is redundant, copy &req->msg to
hdev->arq.msg_q[hdev->arq.tail] directly makes code clean.
So removes the redundant param msg_q.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Reviewed-by: NYongxin Li <liyongxin1@huawei.com>
Signed-off-by: NJunxin Chen <chenjunxin1@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c

@@ -161,7 +161,6 @@ void hclgevf_mbx_handler(struct hclgevf_dev *hdev)
 	struct hclge_mbx_pf_to_vf_cmd *req;
 	struct hclgevf_cmq_ring *crq;
 	struct hclgevf_desc *desc;
-	u16 *msg_q;
 	u16 flag;
 
 	resp = &hdev->mbx_resp;
@@ -243,8 +242,7 @@ void hclgevf_mbx_handler(struct hclgevf_dev *hdev)
 			}
 
 			/* tail the async message in arq */
-			msg_q = hdev->arq.msg_q[hdev->arq.tail];
-			memcpy(&msg_q[0], &req->msg,
+			memcpy(hdev->arq.msg_q[hdev->arq.tail], &req->msg,
 			       HCLGE_MBX_MAX_ARQ_MSG_SIZE * sizeof(u16));
 			hclge_mbx_tail_ptr_move_arq(hdev->arq);
 			atomic_inc(&hdev->arq.count);