drm/amd/display: Move analog check to dce110_hwseq

drm/amd/display: Move analog check to dce110_hwseq

Instead of checking that the signal is analog before calling the
HWSS disable_audio_stream() function to disable audio, move
the check inside the HWSS function.

Suggested-by: Ray Wu <Ray.Wu@amd.com>
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Link: https://lore.kernel.org/r/20251113163348.137315-5-timur.kristof@gmail.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>