net/mlx5e: Remove redundant newline in NL_SET_ERR_MSG_MOD

Fix the following coccicheck warnings:

drivers/net/ethernet/mellanox/mlx5/core/devlink.c:145:29-66: WARNING
avoid newline at end of message in NL_SET_ERR_MSG_MOD
drivers/net/ethernet/mellanox/mlx5/core/devlink.c:140:29-77: WARNING
avoid newline at end of message in NL_SET_ERR_MSG_MOD
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/devlink.c

@@ -137,12 +137,12 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 		 * unregistering devlink instance while holding devlink_mutext.
 		 * Hence, do not support reload.
 		 */
-		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported when SFs are allocated\n");
+		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported when SFs are allocated");
 		return -EOPNOTSUPP;
 	}
 
 	if (mlx5_lag_is_active(dev)) {
-		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported in Lag mode\n");
+		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported in Lag mode");
 		return -EOPNOTSUPP;
 	}