[SCSI] qla4xxx: Fix sparse warning

Fix following warning:-
drivers/scsi/qla4xxx/ql4_os.c:35:5: warning: symbol 'ql4xdisablesysfsboot' was not declared. Should it be static?

drivers/scsi/qla4xxx/ql4_iocb.c:461:5: warning: symbol 'qla4xxx_send_mbox_iocb' was not declared. Should it be static?

drivers/scsi/qla4xxx/ql4_os.c:3025:6: warning: symbol 'qla4xxx_do_work' was not declared. Should it be static?
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla4xxx/ql4_iocb.c

@@ -458,7 +458,7 @@ static struct mrb *qla4xxx_get_new_mrb(struct scsi_qla_host *ha)
 	return mrb;
 }
 
-int qla4xxx_send_mbox_iocb(struct scsi_qla_host *ha, struct mrb *mrb,
+static int qla4xxx_send_mbox_iocb(struct scsi_qla_host *ha, struct mrb *mrb,
 				  uint32_t *in_mbox)
 {
 	int rval = QLA_SUCCESS;

drivers/scsi/qla4xxx/ql4_os.c

@@ -32,7 +32,7 @@ static struct kmem_cache *srb_cachep;
 /*
  * Module parameter information and variables
  */
-int ql4xdisablesysfsboot = 1;
+static int ql4xdisablesysfsboot = 1;
 module_param(ql4xdisablesysfsboot, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(ql4xdisablesysfsboot,
 		 " Set to disable exporting boot targets to sysfs.\n"
@@ -3238,7 +3238,7 @@ int qla4xxx_post_ping_evt_work(struct scsi_qla_host *ha,
 	return QLA_SUCCESS;
 }
 
-void qla4xxx_do_work(struct scsi_qla_host *ha)
+static void qla4xxx_do_work(struct scsi_qla_host *ha)
 {
 	struct qla4_work_evt *e, *tmp;
 	unsigned long flags;