clk: samsung: exynos850: Make PMU_ALIVE_PCLK critical

PMU_ALIVE_PCLK is needed for PMU registers access, and it must be always
running, as not only the kernel accesses PMU registers. Make it critical
to ensure that.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20230308233822.31180-5-semen.protsenko@linaro.org


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