This patch removes the flag IFF_IN_NETPOLL, we don't need it any more since
we have netpoll_tx_running() now.
Signed-off-by: WANG Cong <amwang@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>