dt-bindings: samsung: exynos-sysreg: gs101-peric0/1 require a clock

... otherwise it won't be accessible.

Update the schema to make this obvious.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20240126115517.1751971-1-andre.draszik@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>