scsi: hptiop: make function hptiop_iop_request_callback_itl static

The function hptiop_iop_request_callback_itl does not need to be in
global scope, so make it static.

Cleans up sparse warning:
"symbol 'hptiop_iop_request_callback_itl' was not declared. Should it
 be static?"
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hptiop.c

@@ -800,7 +800,7 @@ static void hptiop_host_request_callback_itl(struct hptiop_hba *hba, u32 _tag)
 	hptiop_finish_scsi_req(hba, tag, req);
 }
 
-void hptiop_iop_request_callback_itl(struct hptiop_hba *hba, u32 tag)
+static void hptiop_iop_request_callback_itl(struct hptiop_hba *hba, u32 tag)
 {
 	struct hpt_iop_request_header __iomem *req;
 	struct hpt_iop_request_ioctl_command __iomem *p;