pinctrl: make the "Debug PINCTRL calls" entry actually do something

DEBUG_PINCTRL wasn't used at all and DEBUG_PINMUX doesn't exist.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>