dt-bindings: clock: exynos850: Add CMU_CPUCLK0 and CMU_CPUCL1

Document CPU clock management unit compatibles and add corresponding
clock indices. Exynos850 has two CPU clusters (CL0 and CL1), each
containing 4 Cortex-A55 cores. CPU PLLs are generating main CPU clocks
for each cluster, and there are alternate ("switch") clocks that can be
used temporarily while re-configuring the PLL for the new rate. ACLK,
ATCLK, PCLKDBG and PERIPHCLK clocks are driving corresponding buses.
CLK_CLUSTERx_SCLK are actual leaf CPU clocks and should be used to
change CPU rates. Also some CoreSight clocks can be derived from
DBG_USER (debug clock).

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20240224202053.25313-2-semen.protsenko@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

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