net/mlx5: Add support for VNIC_ENV internal rq counter

Add mlx5 interface support for reading internal rq out of buffer counter
as part of QUERY_VNIC_ENV command. The command is used by the driver to
query vnic diagnostic statistics from FW.
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

include/linux/mlx5/mlx5_ifc.h

@@ -1116,7 +1116,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 	u8         cache_line_128byte[0x1];
 	u8         reserved_at_165[0x4];
 	u8         rts2rts_qp_counters_set_id[0x1];
-	u8         reserved_at_16a[0x5];
+	u8         reserved_at_16a[0x2];
+	u8         vnic_env_int_rq_oob[0x1];
+	u8         reserved_at_16d[0x2];
 	u8         qcam_reg[0x1];
 	u8         gid_table_size[0x10];
 
@@ -2772,7 +2774,11 @@ struct mlx5_ifc_vnic_diagnostic_statistics_bits {
 
 	u8         transmit_discard_vport_down[0x40];
 
-	u8         reserved_at_140[0xec0];
+	u8         reserved_at_140[0xa0];
+
+	u8         internal_rq_out_of_buffer[0x20];
+
+	u8         reserved_at_200[0xe00];
 };
 
 struct mlx5_ifc_traffic_counter_bits {