net/mlx4_core: Introduce ACCESS_REG CMD and eth_prot_ctrl dev cap

Adding ACCESS REG mlx4 command and use it to implement Query method for
PTYS (Port Type and Speed Register).
Query and store eth_prot_ctrl dev cap.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index b16e1b9..916459e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -1338,6 +1338,15 @@
 		.verify = NULL,
 		.wrapper = mlx4_QUERY_IF_STAT_wrapper
 	},
+	{
+		.opcode = MLX4_CMD_ACCESS_REG,
+		.has_inbox = true,
+		.has_outbox = true,
+		.out_is_imm = false,
+		.encode_slave_id = false,
+		.verify = NULL,
+		.wrapper = NULL,
+	},
 	/* Native multicast commands are not available for guests */
 	{
 		.opcode = MLX4_CMD_QP_ATTACH,