MLK-22025-1 usb: chipidea: phy enter low power mode when host suspend

MLK-22025-1 usb: chipidea: phy enter low power mode when host suspend

On some imx host, if USB PHY is active when bus suspended, host may
have problem on taking over resume signal of remote wakeup from usb
device, resolve this by making PHY enter low power mode right after
bus suspended.

Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>