Interrupt handler fixes:

     o Mark HBA offline in case the firmware cannot recover
       after and ISP system-error.
     o Correct issue where the loop-down-timer was not properly
       being cleared during a port-update event.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>