RDMA/bnxt_re: Use the default mode of congestion control

Instead of driver setting the congestion mode, use
the default values setup by Firmware. Enable the tos_ecn
field in FW.

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/1731660464-27838-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: Kalesh AP

drivers/infiniband/hw/bnxt_re/main.c

@@ -2204,11 +2204,10 @@ static void bnxt_re_setup_cc(struct bnxt_re_dev *rdev, bool enable)
 
 	if (enable) {
 		cc_param.enable  = 1;
-		cc_param.cc_mode = CMDQ_MODIFY_ROCE_CC_CC_MODE_PROBABILISTIC_CC_MODE;
+		cc_param.tos_ecn = 1;
 	}
 
-	cc_param.mask = (CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_CC_MODE |
-			 CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_ENABLE_CC |
+	cc_param.mask = (CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_ENABLE_CC |
 			 CMDQ_MODIFY_ROCE_CC_MODIFY_MASK_TOS_ECN);
 
 	if (bnxt_qplib_modify_cc(&rdev->qplib_res, &cc_param))