Transfer command descriptor is allocated in ufshcd_memory_alloc()
and referenced by transfer request descriptor with stride size
sizeof_utp_transfer_cmd_desc()
instead of
sizeof(struct utp_transfer_cmd_desc).
Consequently, computing tag by address offset should also refer to the
same stride.
As suggested, sizeof_utp_transfer_cmd_desc() is further renamed to
ufshcd_get_ucd_size().