usb: cdns3: host: add .suspend_quirk for xhci-plat.c

cdns3 has some special PM sequence between xhci_bus_suspend and
xhci_suspend, add quirk to implement it.

Reviewed-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>