ARM: dts: gpio-ranges property is now required

Since [1], added in 5.7, the absence of a gpio-ranges property has
prevented GPIOs from being restored to inputs when released.

See: https://forums.raspberrypi.com/viewtopic.php?t=324585



[1] commit 2ab73c6d ("gpio: Support GPIO controllers without
    pin-ranges")

Signed-off-by: Phil Elwell <phil@raspberrypi.com>