scsi: ufs: ufshcd: Fix some function doc-rot

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

 drivers/scsi/ufs/ufshcd.c:6603: warning: Function parameter or member 'hba' not described in 'ufshcd_try_to_abort_task'
 drivers/scsi/ufs/ufshcd.c:6603: warning: Function parameter or member 'tag' not described in 'ufshcd_try_to_abort_task'
 drivers/scsi/ufs/ufshcd.c:6603: warning: Excess function parameter 'cmd' description in 'ufshcd_try_to_abort_task'

Link: https://lore.kernel.org/r/20201102142359.561122-12-lee.jones@linaro.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Santosh Yaraganavi <santosh.sy@samsung.com>
Cc: Vinayak Holikatti <h.vinayak@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -6599,7 +6599,8 @@ static void ufshcd_set_req_abort_skip(struct ufs_hba *hba, unsigned long bitmap)
 
 /**
  * ufshcd_try_to_abort_task - abort a specific task
- * @cmd: SCSI command pointer
+ * @hba: Pointer to adapter instance
+ * @tag: Task tag/index to be aborted
  *
  * Abort the pending command in device by sending UFS_ABORT_TASK task management
  * command, and in host controller by clearing the door-bell register. There can