[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_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 117b562..f38d136 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -41,7 +41,7 @@
 qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
 {
 	scsi_qla_host_t	*ha;
-	device_reg_t __iomem *reg;
+	struct device_reg_2xxx __iomem *reg;
 	int		status;
 	unsigned long	flags;
 	unsigned long	iter;
@@ -54,7 +54,7 @@
 		return (IRQ_NONE);
 	}
 
-	reg = ha->iobase;
+	reg = &ha->iobase->isp;
 	status = 0;
 
 	spin_lock_irqsave(&ha->hardware_lock, flags);
@@ -118,7 +118,7 @@
 qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
 {
 	scsi_qla_host_t	*ha;
-	device_reg_t __iomem *reg;
+	struct device_reg_2xxx __iomem *reg;
 	int		status;
 	unsigned long	flags;
 	unsigned long	iter;
@@ -133,7 +133,7 @@
 		return (IRQ_NONE);
 	}
 
-	reg = ha->iobase;
+	reg = &ha->iobase->isp;
 	status = 0;
 
 	spin_lock_irqsave(&ha->hardware_lock, flags);
@@ -220,7 +220,7 @@
 {
 	uint16_t	cnt;
 	uint16_t __iomem *wptr;
-	device_reg_t __iomem *reg = ha->iobase;
+	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 
 	/* Load return mailbox registers. */
 	ha->flags.mbox_int = 1;
@@ -261,7 +261,7 @@
 	uint16_t	handle_cnt;
 	uint16_t	cnt;
 	uint32_t	handles[5];
-	device_reg_t __iomem *reg = ha->iobase;
+	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 	uint32_t	rscn_entry, host_pid;
 	uint8_t		rscn_queue_index;
 
@@ -707,7 +707,7 @@
 void
 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 {
-	device_reg_t __iomem *reg = ha->iobase;
+	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 	sts_entry_t	*pkt;
 	uint16_t        handle_cnt;
 	uint16_t        cnt;