dt-bindings: arm: add CTCU device for monaco

The CTCU device for monaco shares the same configurations as SA8775p. Add
a fallback to enable the CTCU for monaco to utilize the compitable of the
SA8775p.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251103-enable-ctcu-for-monaco-v4-1-92ff83201584@oss.qualcomm.com