If we want to wake up system via usb, the 24Mhz osc could not be
disabled during suspend, read the usb phy SIDDQ bit to decide whether
to switch to 32khz clock-in.
Signed-off-by: NChris Zhong <zyw@rock-chips.com>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Tested-by: NDouglas Anderson <dianders@chromium.org>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>