usb: chipidea: add USB PHY event

Add USB PHY event for below situation:
- usb role changed
- vbus connect
- vbus disconnect
- gadget driver is enumerated

USB PHY driver can get the last event after above situation occurs
and deal with different situations.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20230627110353.1879477c

-1-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>