Remove irq from probe info message

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Move gpio irq mapping from netdev_open to spi_probe

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Avoid using board struct for gpio, use device tree instead

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Remove unused board structures

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>