arm64: dts: exynos: gs101: add #clock-cells to the ACPM protocol node

arm64: dts: exynos: gs101: add #clock-cells to the ACPM protocol node

Make the ACPM node a clock provider by adding the mandatory
"#clock-cells" property, which allows devices to reference
its clock outputs.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Tested-by: Peter Griffin <peter.griffin@linaro.org> # on gs101-oriole
Link: https://patch.msgid.link/20250924-acpm-dvfs-dt-v4-1-3106d49e03f5@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>