dt-bindings: soc: samsung: exynos-pmu: Add exynos990-pmu compatible

Add a dt-binding compatible for the Exynos990 PMU. It's compatible
with the Exynos7 PMU design. It handles system reboot, as well as
other system control registers (i.e registers for the USB PHY).

Signed-off-by: Igor Belwon <igor.belwon@mentallysanemainliners.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20241204145559.524932-2-igor.belwon@mentallysanemainliners.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241231131742.134329-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Arnd Bergmann <arnd@arndb.de>