ARM: dts: rockchip: add clocks property to cru node rk3228

Add clocks and clock-names to the rk3228 cru node, because
the device has to have at least one input clock.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20220330121923.24240-2-jbx6244@gmail.com


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