net/mlx5e: Fix unnecessary flow_block_cb_is_busy call

When call flow_block_cb_is_busy. The indr_priv is guaranteed to
NULL ptr. So there is no need to call flow_bock_cb_is_busy.

Fixes: 0d4fd02e ("net: flow_offload: add flow_block_cb_is_busy() and use it")
Signed-off-by: Nwenxu <wenxu@ucloud.cn>
Signed-off-by: NSaeed Mahameed <saeedm@mellanox.com>

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

@@ -722,10 +722,6 @@ mlx5e_rep_indr_setup_tc_block(struct net_device *netdev,
 		if (indr_priv)
 			return -EEXIST;
 
-		if (flow_block_cb_is_busy(mlx5e_rep_indr_setup_block_cb,
-					  indr_priv, &mlx5e_block_cb_list))
-			return -EBUSY;
-
 		indr_priv = kmalloc(sizeof(*indr_priv), GFP_KERNEL);
 		if (!indr_priv)
 			return -ENOMEM;