drm/i915/audio: s/ilk/ibx/
Rename the ilk stuff to ibx, as the audio logic lives
in the PCH. The only exception are VLV/CHV but their audio
hardware was stolen from ibx so the name still fits.
Also most of the register defines also use the IBX namespace.
Cc: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230124144628.4649-13-ville.syrjala@linux.intel.com
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