scsi: ufs: Convert sysfs sprintf/snprintf family to sysfs_emit

scsi: ufs: Convert sysfs sprintf/snprintf family to sysfs_emit

Fix the following coccicheck warning:

./drivers/scsi/ufs/ufshcd.c:1538:8-16: WARNING: use scnprintf or
sprintf.

Link: https://lore.kernel.org/r/1614665298-115183-1-git-send-email-jiapeng.chong@linux.alibaba.com
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>