ARM: dts: rockchip: Split GPIO keys for veyron into multiple devices

With a single device DT overrides can become messy, especially when
keys are added or removed. Multiple devices also allow to
enable/disable wakeup per key/group.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
[used actual switch+event constants in new lid-switch entry]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>