usb: gadget: uvc: also use try_format in set_format

Since e219a712 (usb: gadget: uvc: add v4l2 try_format api call) the
try_format function is available. With this function includes checks for
valid configurations programmed in the configfs. We use this function to
ensure to return valid values on the set_format callback.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Fixes: e219a712 ("usb: gadget: uvc: add v4l2 try_format api call")
Link: https://lore.kernel.org/r/20221026182240.363055-1-m.grzeschik@pengutronix.de


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