net/mlx5e: Add ethtool support for rxvlan-offload (vlan stripping)

Use ethtool -K <interface> rxvlan <on/off> to enable/disable
C-TAG vlan stripping by hardware.

Signed-off-by: Gal Pressman <galp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 1a17067..2cc5e9f 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -46,6 +46,10 @@
 #include <linux/mlx5/doorbell.h>
 
 enum {
+	MLX5_RQ_BITMASK_VSD = 1 << 1,
+};
+
+enum {
 	MLX5_BOARD_ID_LEN = 64,
 	MLX5_MAX_NAME_LEN = 16,
 };