hw/usb/ohci: Implement resume on connection status change

hw/usb/ohci: Implement resume on connection status change

If certain bit is set remote wake up should change state from
suspended to resume and generate interrupt. There was a todo comment
for this, implement that by moving existing resume logic to a function
and call that.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <35c4d4ccf2f73e6a87cdbd28fb6a1b33de72ed74.1676916640.git.balaton@eik.bme.hu>
[PMD: Have ohci_resume() return a boolean]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>