This resolves compile errors on um-allyesconfig.

Note that there are many other drivers which have the same issue.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>