scsi: ufs-mediatek: Add fixup_dev_quirks vops

Add fixup_dev_quirk vops in MediaTek UFS platforms and provide an initial
vendor-specific device quirk table.

Link: https://lore.kernel.org/r/20200508080115.24233-5-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>