gpio: zevio: Use of_mm_gpiochip_remove Since d621e8bae5ac9c67 (Create of_mm_gpiochip_remove), there is a counterpart for of_mm_gpiochip_add. This patch implements the remove function of the driver making use of it. Cc: Alexandre Courbot <[email protected]> Cc: Fabian Vogt <[email protected]> Signed-off-by: Ricardo Ribalda Delgado <[email protected]> Signed-off-by: Linus Walleij <[email protected]>