arm64: dts: exynos: add dedicated SYSREG compatibles to Exynos850

Exynos850 has two different SYSREGs, so use dedicated compatibles for them.

Signed-off-by: Sriranjani P <sriranjani.p@samsung.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20221214044342.49766-3-sriranjani.p@samsung.com


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