[SCSI] qla2xxx: Add ISP24xx definitions.

Add ISP24xx definitions.

Add requisite structure definitions and #define's for ISP24xx
support.  Also drop volatile modifiers from device_reg_* register
layouts as the members are never really accessed, only their
offsets within the layout are used during reads and writes.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index eeaec7c..b201971 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -58,7 +58,7 @@
 {
 	int		rval;
 	unsigned long    flags = 0;
-	device_reg_t __iomem *reg = ha->iobase;
+	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 	struct timer_list	tmp_intr_timer;
 	uint8_t		abort_active = test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 	uint8_t		io_lock_on = ha->flags.init_done;