This will make the system alot more responsive while ping flooding the
ucc_geth ethernet interface.

Also set NAPI weight to 64 as this is a common value.
Signed-off-by: NJoakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>