In the ufshcd_clear_cmds(), the 2nd pamameter would be the
bit mask of the command to be cleared in the transfer request
door bell register. This bit mask mechanism does not scale well in
mcq mode when the queue depth becomes much greater than 64. Change the
2nd parameter to the function to be the task_tag number of the
corresponding bit to be cleared in the door bell register.
By doing so, mcq mode with a large queue depth can reuse this function.
Since the behavior of this function is changed from handling
multiple commands into a single command, rename ufshcd_clear_cmds()
into ufshcd_clear_cmd().