usb: misc: onboard_usb_hub: Add reset-gpio support

Despite default reset upon probe, release reset line after powering up
the hub and assert reset again before powering down.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220727141117.909361-1-alexander.stein@ew.tq-group.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>