devlink: Fix port_type_set function pointer check

Fix a typo when checking existence of port_type_set function pointer.

Fixes: 82564f6c ("devlink: Simplify devlink port API calls")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/devlink.c

@@ -1274,7 +1274,7 @@ static int devlink_port_type_set(struct devlink_port *devlink_port,
 {
 	int err;
 
-	if (devlink_port->devlink->ops->port_type_set)
+	if (!devlink_port->devlink->ops->port_type_set)
 		return -EOPNOTSUPP;
 
 	if (port_type == devlink_port->type)