bnxt_en: Workaround Nitro A0 RX hardware bug (part 4).

bnxt_en: Workaround Nitro A0 RX hardware bug (part 4).

Orabug: 24567991

Allocate special vnic for dropping packets not matching the RX filters.
First vnic is for normal RX packets and the driver will drop all
packets on the 2nd vnic.

Signed-off-by: Prashant Sreedharan <prashant.sreedharan@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit dc52c6c70e0066e9cef886907f820411bebe8e07)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>