scsi: ufs: cdns-pltfrm: Supply function names for headers

scsi: ufs: cdns-pltfrm: Supply function names for headers

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/ufs/cdns-pltfrm.c:109: warning: expecting prototype for Sets HCLKDIV register value based on the core_clk(). Prototype was for cdns_ufs_set_hclkdiv() instead
 drivers/scsi/ufs/cdns-pltfrm.c:144: warning: wrong kernel-doc identifier on line:
 drivers/scsi/ufs/cdns-pltfrm.c:160: warning: wrong kernel-doc identifier on line:
 drivers/scsi/ufs/cdns-pltfrm.c:176: warning: wrong kernel-doc identifier on line:

Link: https://lore.kernel.org/r/20210312094738.2207817-17-lee.jones@linaro.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Jan Kotas <jank@cadence.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>