On cAVS/SOF platforms (e.g. LG Gram 8086:7728), STATESTS reads 0
because the codec sits behind the audio DSP; the legacy HDA codec-wake
mechanism cannot reach it. enumerate() previously hardcoded codec 0 and
would hang reading a non-existent codec via CORB/RIRB. Now, if no
codecs respond after reset_controller(), log the DSP-platform diagnosis
and fail honestly with ENODEV instead of hanging. A SOF/cAVS driver
(Phase 8.2) is required for these platforms.
Red Bear OS
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