devlink: remove unused priv_size

Remove unused and useless priv_size member from struct devlink_ops.

Cc: Jiri Pirko <[e-mail]>
Signed-off-by: Ivan Vecera <[e-mail]>
Acked-by: Jiri Pirko <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/net/devlink.h

···
 };
 
 struct devlink_ops {
-	size_t priv_size;
 	int (*port_type_set)(struct devlink_port *devlink_port,
 			     enum devlink_port_type port_type);
 	int (*port_split)(struct devlink *devlink, unsigned int port_index,