dt-bindings: soc: samsung: exynos-sysreg: add power-domains

dt-bindings: soc: samsung: exynos-sysreg: add power-domains

On gs101 only, sysreg can be part of a power domain, so we need to
allow the relevant property 'power-domains' for the relevant
compatibles google,gs101-*-sysreg.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20251010-power-domains-dt-bindings-soc-samsung-exynos-sysreg-v2-1-552f5787a3f3@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>