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[why] DCN has sidebands to control some clocks, it is useful for clk_mgr to always update the clocks it explicitly controls rather than skip them because it enables more configurations to work without SMU [how] only skip handling clocks where SMU manages the frequency for clocks with DENTIST sideband (DISP/DPP), only skip the voltage request when SMU not available, but otherwise proceed normally Signed-off-by: Jun Lei <Jun.Lei@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>