net/mlx5: Return correct EC_VF function ID

The ECVF function ID range is 1..max_ec_vfs. Currently
mlx5_vport_to_func_id returns 0..max_ec_vfs - 1. Which
results in a syndrome when querying the caps with more
recent firmware, or reading incorrect caps with older
firmware that supports EC VFs.

Fixes: 9ac0b12 ("net/mlx5: Update vport caps query/set for EC VFs")
Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h

@@ -361,7 +361,7 @@ static inline bool mlx5_core_is_ec_vf_vport(const struct mlx5_core_dev *dev, u16
 
 static inline int mlx5_vport_to_func_id(const struct mlx5_core_dev *dev, u16 vport, bool ec_vf_func)
 {
-	return ec_vf_func ? vport - mlx5_core_ec_vf_vport_base(dev)
+	return ec_vf_func ? vport - mlx5_core_ec_vf_vport_base(dev) + 1
 			  : vport;
 }