clk: samsung: exynos850: Implement CMU_AUD domain

CMU_AUD clock domain provides clocks for ABOX IP-core (audio subsystem).
According to Exynos850 TRM, CMU_AUD generates Cortex-A32 clock, bus
clock and audio clocks for BLK_AUD.

This patch adds next clocks:
  - bus clocks in CMU_TOP needed for CMU_AUD
  - all internal CMU_AUD clocks
  - leaf clocks for Cortex-A32, Speedy FM, UAIF0..UAIF6 (Unified Audio
    Interface), CNT (counter), ABOX IP-core, ASB (Asynchronous Bridge),
    DAP (Debug Access Port), I2S Codec MCLK, D_TZPC (TrustZone
    Protection Controller), GPIO, PPMU (Platform Performance Monitoring
    Unit), SysMMU, SysReg and WDT

ABOX clock was marked as CLK_IGNORE_UNUSED, as system hangs on boot
otherwise. Once ABOX driver is implemented, maybe it can be handled
there instead.

Signed-off-by: Sam Protsenko <[email protected]>
Acked-by: Chanwoo Choi <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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