net/mlx5e: Fix error codes in alloc_branch_attr()

Set the error code if set_branch_dest_ft() fails.

Fixes: ccbe3300 ("net/mlx5e: TC, Don't offload post action rule if not supported")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -3778,7 +3778,8 @@ alloc_branch_attr(struct mlx5e_tc_flow *flow,
 		break;
 	case FLOW_ACTION_ACCEPT:
 	case FLOW_ACTION_PIPE:
-		if (set_branch_dest_ft(flow->priv, attr))
+		err = set_branch_dest_ft(flow->priv, attr);
+		if (err)
 			goto out_err;
 		break;
 	case FLOW_ACTION_JUMP:
@@ -3788,7 +3789,8 @@ alloc_branch_attr(struct mlx5e_tc_flow *flow,
 			goto out_err;
 		}
 		*jump_count = cond->extval;
-		if (set_branch_dest_ft(flow->priv, attr))
+		err = set_branch_dest_ft(flow->priv, attr);
+		if (err)
 			goto out_err;
 		break;
 	default: