The functionality of vendor specific ops should be handled properly in
platform specific driver, but should not count on the UFS driver.

Link: https://lore.kernel.org/r/1581392451-28743-5-git-send-email-cang@codeaurora.orgReviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>