usb: renesas-xhci: Fix handling of unknown ROM state

usb: renesas-xhci: Fix handling of unknown ROM state

The ROM load sometimes seems to return an unknown status
(RENESAS_ROM_STATUS_NO_RESULT) instead of success / fail.

If the ROM load indeed failed this leads to failures when trying to
communicate with the controller later on.

Attempt to load firmware using RAM load in those cases.

Fixes: 2478be82de44 ("usb: renesas-xhci: Add ROM loader for uPD720201")
Cc: [email protected]
Cc: Mathias Nyman <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Vinod Koul <[email protected]>
Tested-by: Vinod Koul <[email protected]>
Reviewed-by: Vinod Koul <[email protected]>
Signed-off-by: Moritz Fischer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>