bnxt_en: Fix W=stringop-overflow warning in bnxt_dcb.c

Fix the following warning:

drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c: In function ‘bnxt_hwrm_queue_cos2bw_cfg’:
cc1: error: writing 12 bytes into a region of size 1 [-Werror=stringop-overflow ]
In file included from drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c:19:
drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h:6045:17: note: destination object ‘unused_0’ of size 1
 6045 |         u8      unused_0;

Fix it by modifying struct hwrm_queue_cos2bw_cfg_input to use an array
of sub struct similar to the previous patch.  This will eliminate the
pointer arithmetc to calculate the destination pointer passed to
memcpy().

Link: https://lore.kernel.org/netdev/CACKFLinikvXmKcxr4kjWO9TPYxTd2cb5agT1j=w9Qyj5-24s5A@mail.gmail.com/Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230807145720.159645-3-michael.chan@broadcom.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c

@@ -98,7 +98,6 @@ static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
 {
 	struct hwrm_queue_cos2bw_cfg_input *req;
 	struct bnxt_cos2bw_cfg cos2bw;
-	void *data;
 	int rc, i;
 
 	rc = hwrm_req_init(bp, req, HWRM_QUEUE_COS2BW_CFG);
@@ -129,11 +128,15 @@ static int bnxt_hwrm_queue_cos2bw_cfg(struct bnxt *bp, struct ieee_ets *ets,
 				cpu_to_le32((ets->tc_tx_bw[i] * 100) |
 					    BW_VALUE_UNIT_PERCENT1_100);
 		}
-		data = &req->unused_0 + qidx * (sizeof(cos2bw) - 4);
-		memcpy(data, &cos2bw.cfg, sizeof(cos2bw) - 4);
 		if (qidx == 0) {
 			req->queue_id0 = cos2bw.queue_id;
-			req->unused_0 = 0;
+			req->queue_id0_min_bw = cos2bw.min_bw;
+			req->queue_id0_max_bw = cos2bw.max_bw;
+			req->queue_id0_tsa_assign = cos2bw.tsa;
+			req->queue_id0_pri_lvl = cos2bw.pri_lvl;
+			req->queue_id0_bw_weight = cos2bw.bw_weight;
+		} else {
+			memcpy(&req->cfg[i - 1], &cos2bw.cfg, sizeof(cos2bw.cfg));
 		}
 	}
 	return hwrm_req_send(bp, req);