dt-bindings: soc: samsung: exynos-sysreg: add dedicated SYSREG compatibles to Exynos850

Exynos850 has two different SYSREGs, hence add dedicated compatibles for
them and deprecate usage of generic Exynos850 compatible alone.

Signed-off-by: Sriranjani P <sriranjani.p@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20221214044342.49766-2-sriranjani.p@samsung.com


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