scsi: qla2xxx: Increase the size of the mailbox arrays from 4 to 8

This patch avoids that Coverity complains that qla2x00_async_event() writes
outside the bounds of the mb[] arrays (MBA_IDC_AEN case).

Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_isr.c

@@ -49,7 +49,7 @@ qla2100_intr_handler(int irq, void *dev_id)
 	int		status;
 	unsigned long	iter;
 	uint16_t	hccr;
-	uint16_t	mb[4];
+	uint16_t	mb[8];
 	struct rsp_que *rsp;
 	unsigned long	flags;
 
@@ -168,7 +168,7 @@ qla2300_intr_handler(int irq, void *dev_id)
 	unsigned long	iter;
 	uint32_t	stat;
 	uint16_t	hccr;
-	uint16_t	mb[4];
+	uint16_t	mb[8];
 	struct rsp_que *rsp;
 	struct qla_hw_data *ha;
 	unsigned long	flags;

drivers/scsi/qla2xxx/qla_nx.c

@@ -2039,7 +2039,7 @@ qla82xx_intr_handler(int irq, void *dev_id)
 	unsigned long	flags;
 	unsigned long	iter;
 	uint32_t	stat = 0;
-	uint16_t	mb[4];
+	uint16_t	mb[8];
 
 	rsp = (struct rsp_que *) dev_id;
 	if (!rsp) {
@@ -2123,7 +2123,7 @@ qla82xx_msix_default(int irq, void *dev_id)
 	unsigned long flags;
 	uint32_t stat = 0;
 	uint32_t host_int = 0;
-	uint16_t mb[4];
+	uint16_t mb[8];
 
 	rsp = (struct rsp_que *) dev_id;
 	if (!rsp) {
@@ -2219,7 +2219,7 @@ qla82xx_poll(int irq, void *dev_id)
 	int status = 0;
 	uint32_t stat;
 	uint32_t host_int = 0;
-	uint16_t mb[4];
+	uint16_t mb[8];
 	unsigned long flags;
 
 	rsp = (struct rsp_que *) dev_id;

drivers/scsi/qla2xxx/qla_nx2.c

@@ -3895,7 +3895,7 @@ qla8044_intr_handler(int irq, void *dev_id)
 	unsigned long	flags;
 	unsigned long	iter;
 	uint32_t	stat;
-	uint16_t	mb[4];
+	uint16_t	mb[8];
 	uint32_t leg_int_ptr = 0, pf_bit;
 
 	rsp = (struct rsp_que *) dev_id;