qlcnic: Fix firmware abort code check.

Check bits 8-28 of peg_halt status register for firmware abort code.

Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com>
Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>