mxc_gpio_mode checks for invalid pins and so it returns zero for
success, -EINVAL for invalid pins.
While at it, remove definitions of GPIO_PORT_MAX removed as they are
unused now.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Addionally make iomux-mx*.h headers stand-alone and similar to iomux-v3
platform files should include their platform iomux header from now on.
For now iomux.h simply includes all iomux-v1 platform headers and so
provides compatibility until all files are converted.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
While at it move register modification to static inlines and
so make the relevant code more readable.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
