ucc_geth: Move freeing of TX packets to NAPI context

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: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ucc_geth.h

@@ -852,7 +852,6 @@ struct ucc_geth_hardware_statistics {
 /* Driver definitions */
 #define TX_BD_RING_LEN                          0x10
 #define RX_BD_RING_LEN                          0x10
-#define UCC_GETH_DEV_WEIGHT                     TX_BD_RING_LEN
 
 #define TX_RING_MOD_MASK(size)                  (size-1)
 #define RX_RING_MOD_MASK(size)                  (size-1)