Merge branch 'net-lantiq-Fix-bugs-in-NAPI-handling'

Hauke Mehrtens says:

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net: lantiq: Fix bugs in NAPI handling

This fixes multiple bugs in the NAPI handling.

Changes since:
v1:
 - removed stable tag from "net: lantiq: use netif_tx_napi_add() for TX NAPI"
 - Check the NAPI budged in "net: lantiq: Use napi_complete_done()"
 - Add extra fix "net: lantiq: Disable IRQs only if NAPI gets scheduled"
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Signed-off-by: David S. Miller <davem@davemloft.net>