LF-3752 usb: dwc3: core: don't enable wakeup for runtime PM

LF-3752 usb: dwc3: core: don't enable wakeup for runtime PM

Don't enable dwc3 core to wakeup system by default if runtime suspended,
this will make the power domain of dwc3 core or its parent device can't be
off while system sleep even system wakeup by usb is not required.

Fixes: fc8bb91bc83e ("usb: dwc3: implement runtime PM")
Cc: <Stable@vger.kernel.org>
Reviewed-by: Ran Wang<ran.wang_1@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>