dt-bindings: clock: convert rockchip,rk3328-cru.txt to YAML

Convert RK3328 clock controller bindings to DT schema

Changes against original bindings:
 - Add clocks and clock-names as the device has at least one input clock.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
[add Krzysztof's review from v1, shorten commit description]
Link: https://lore.kernel.org/r/20240930215001.1999212-2-heiko@sntech.de


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