usb: mtu3: support runtime PM for host mode

Use a dedicated wakeup irq for runtime suspend/resume, and interrupts
names are provided if using wakeup irq, this patch only support host
mode.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1626340078-29111-11-git-send-email-chunfeng.yun@mediatek.com


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