scsi: ufs: bsg: Let result in struct ufs_bsg_reply be signed int

According to the comments in struct ufs_bsg_reply and its usage, the result
should be signed int, not __u32.
Signed-off-by: NBean Huo <beanhuo@micron.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

include/uapi/scsi/scsi_bsg_ufs.h

@@ -95,7 +95,7 @@ struct ufs_bsg_reply {
 	 * msg and status fields. The per-msgcode reply structure
 	 * will contain valid data.
 	 */
-	__u32 result;
+	int result;
 
 	/* If there was reply_payload, how much was received? */
 	__u32 reply_payload_rcv_len;