Fix a typo when checking existence of port_type_set function pointer.
Fixes: 82564f6c706a ("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>