arm64: dts: rockchip: Add #clock-cells value for rk805

Based on a brief discussion on the mailing list it was determined that
clock-cells should be a required parameter in the event that a consumer
of the clock gets added in an overlay.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220303203958.4904-3-macroalpha82@gmail.com


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