dt-bindings: clock: rk3588: drop CLK_NR_CLKS

CLK_NR_CLKS should not be part of the binding. Let's drop it, since
the kernel code no longer uses it either.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20240126182919.48402-3-sebastian.reichel@collabora.com


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