dt-bindings: clock: exynos850: Add PDMA clocks

Add constants for Peripheral DMA (PDMA) clocks in CMU_CORE controller:
  - PDMA_ACLK: clock for PDMA0 (regular DMA)
  - SPDMA_ACLK: clock for PDMA1 (secure DMA)

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20240120012948.8836-2-semen.protsenko@linaro.org


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