net/mlx5: Fix counter list hardware structure

The counter list hardware structure doesn't contain a clear and
num_of_counters fields, remove them.

These wrong fields were never used by the driver hence no other driver
changes.

Fixes: a351a1b03b ("net/mlx5: Introduce bulk reading of flow counters")
Signed-off-by: Rabie Loulou <rabiel@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

include/linux/mlx5/mlx5_ifc.h

@@ -1071,8 +1071,7 @@ struct mlx5_ifc_dest_format_struct_bits {
 };
 
 struct mlx5_ifc_flow_counter_list_bits {
-	u8         clear[0x1];
-	u8         num_of_counters[0xf];
+	u8         reserved_at_0[0x10];
 	u8         flow_counter_id[0x10];
 
 	u8         reserved_at_20[0x20];