fotg210-udc: Use dev pointer in probe and dev_messages

Add a local struct device *dev pointer and use dev_err()
etc to report status.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221114115201.302887-1-linus.walleij@linaro.org


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