mlx4: Paravirtualize Node Guids for slaves

This is necessary in order to support > 1 VF/PF in a VM for software
that uses the node guid as a discriminator, such as librdmacm.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/mlx4/mlx4_ib.h

@@ -723,4 +723,7 @@ int mlx4_ib_device_register_sysfs(struct mlx4_ib_dev *device) ;
 
 void mlx4_ib_device_unregister_sysfs(struct mlx4_ib_dev *device);
 
+__be64 mlx4_ib_gen_node_guid(void);
+
+
 #endif /* MLX4_IB_H */