net/mlx5: E-Switch, free flow_group_in after creating the restore table

We allocate a temporary memory but forget to free it.

Fixes: 11b717d6 ("net/mlx5: E-Switch, Get reg_c0 value on CQE")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

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

@@ -1566,6 +1566,8 @@ static int esw_create_restore_table(struct mlx5_eswitch *esw)
 	esw->offloads.restore_group = g;
 	esw->offloads.restore_copy_hdr_id = mod_hdr;
 
+	kvfree(flow_group_in);
+
 	return 0;
 
 err_mod_hdr: