fotg210-udc: Improve device initialization

Reset the device explicitly to get into a known state and also set the chip
enable bit. Additionally, mask interrupts which aren't handled.

Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230123073508.2350402-4-linus.walleij@linaro.org


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