net/mlx5: Introduce log_max_current_uc_list_wr_supported bit

Downstream patch will use this bit in order to know whether the device
supports changing of max_uc_list.
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

include/linux/mlx5/mlx5_ifc.h

@@ -1621,7 +1621,7 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 
 	u8         ext_stride_num_range[0x1];
 	u8         roce_rw_supported[0x1];
-	u8         reserved_at_3a2[0x1];
+	u8         log_max_current_uc_list_wr_supported[0x1];
 	u8         log_max_stride_sz_rq[0x5];
 	u8         reserved_at_3a8[0x3];
 	u8         log_min_stride_sz_rq[0x5];