GPIO_DR ist defined already as GPIO_GPIO in imx-regs.h. There's no need to
define archdependent GPIO_DR. This one fixes a regression brought in by
d5ec921
Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>