[SCSI] qla2xxx: Add ISP24xx ISR routines.

Add ISP24xx ISR routines.

Add appropriate glue-code for ISP24xx support -- this
included generalizing some of the core handling
routines (qla2x00_async_event() [pull-up retrieval of
mailbox values] and qla2x00_status_entry()].  Fixup
2100/2300 ISRs to handle the new conventions.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/qla2xxx/qla_gbl.h

@@ -211,6 +211,7 @@ qla2x00_set_serdes_params(scsi_qla_host_t *, uint16_t, uint16_t, uint16_t);
  */
 extern irqreturn_t qla2100_intr_handler(int, void *, struct pt_regs *);
 extern irqreturn_t qla2300_intr_handler(int, void *, struct pt_regs *);
+extern irqreturn_t qla24xx_intr_handler(int, void *, struct pt_regs *);
 extern void qla2x00_process_response_queue(struct scsi_qla_host *);
 
 /*