arm64: dts: rockchip: restyle rockchip,pins on rk3399-rock-pi-4

The define RK_FUNC_1 is no longer used,
so restyle the rockchip,pins definitions.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20191015205852.4200-1-jbx6244@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>