usb: xhci-mtk: add support ip-sleep wakeup for mT8192

Add support ip-sleep wakeup for mT8192, it's a specific revision,
and not following IPM rule.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1616482975-17841-7-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>