arm64: dts: exynos: add dedicated SYSREG compatibles to Exynos5433

Exynos5433 has several different SYSREGs, so use dedicated compatibles
for them.

Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Sriranjani P <sriranjani.p@samsung.com>
Link: https://lore.kernel.org/r/20221127123259.20339-1-krzysztof.kozlowski@linaro.org


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