[SCSI] bnx2fc: Drop incoming ABTS

As an initiator, driver need not handle incoming ABTS. It initiates an ABTS if
any IO requests time out.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>