scsi: ufs: Fix a kernel-doc related formatting issue

Fix the following W=1 kernel build warning:

drivers/scsi/ufs/ufshcd.c:9773: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst

[mkp: upcase abbreviations]

Link: https://lore.kernel.org/r/20210531163122.451375-1-huobean@gmail.com
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -9770,10 +9770,7 @@ static const struct dev_pm_ops ufs_rpmb_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(NULL, ufshcd_rpmb_resume)
 };
 
-/**
- * Describes the ufs rpmb wlun.
- * Used only to send uac.
- */
+/* ufs_rpmb_wlun_template - Describes UFS RPMB WLUN. Used only to send UAC. */
 static struct scsi_driver ufs_rpmb_wlun_template = {
 	.gendrv = {
 		.name = "ufs_rpmb_wlun",