BACKPORT: scsi: ufs: Allow WriteBooster on UFS 2.2 devices

According to the UFS specification, WriteBooster is officially supported by
UFS 2.2.

Since UFS 2.2 specification has been finalized in JEDEC and such devices
have also showed up in the market, modify the checking rule for
ufshcd_wb_probe() to allow these devices to enable WriteBooster.

Link: https://lore.kernel.org/r/20200522083212.4008-3-stanley.chu@mediatek.com


Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Bug: 151050916
(cherry picked from commit c7cee3e746a5b5a79d415112f7b7af90e8259fa1)
[ Resolved minor conflict in drivers/scsi/ufs/ufshcd.c ]
Change-Id: Ifce7223b8892b6c0cd7f4635e96b103a86be4556
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>