IB/mlx4:  Display misc device information under /sys/class/infiniband/

display the following device information under /sys/class/infiniband/mlx4_X:
board_id, fw_ver, hw_rev, hca_type.

This patch makes this information available to userspace utilities
such as ibstat and ibv_devinfo.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index cfb78fb..a93520c 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -49,6 +49,10 @@
 };
 
 enum {
+	MLX4_BOARD_ID_LEN = 64
+};
+
+enum {
 	MLX4_DEV_CAP_FLAG_RC		= 1 <<  0,
 	MLX4_DEV_CAP_FLAG_UC		= 1 <<  1,
 	MLX4_DEV_CAP_FLAG_UD		= 1 <<  2,
@@ -272,6 +276,8 @@
 	unsigned long		flags;
 	struct mlx4_caps	caps;
 	struct radix_tree_root	qp_table_tree;
+	u32			rev_id;
+	char			board_id[MLX4_BOARD_ID_LEN];
 };
 
 struct mlx4_init_port_param {