be2net: get rid of custom busy poll code

be2net: get rid of custom busy poll code

Orabug: 25570957

Compared to custom busy_poll, the generic NAPI one is better, since
it allows to use GRO, and it removes a lot of code and extra locked
operations in fast path.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Sathya Perla <sathya.perla@broadcom.com>
Cc: Ajit Khaparde <ajit.khaparde@broadcom.com>
Cc: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit fb6113e688e0bf5bc3081d6ff02e8ad77fed3c7a)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/net/ethernet/emulex/benet/be_main.c

Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>