drm/i915/sdvo: Only use "presence detect" for has_audio readout

Align the SDVO audio code with the native HDMI/DP audio and
use just the "presence detect" bit for the has_audio readout.
The "ELD valid" bit will be used for ELD readout soon.

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/20230124144628.4649-9-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_sdvo.c

@@ -1732,9 +1732,7 @@ static void intel_sdvo_get_config(struct intel_encoder *encoder,
 
 	if (intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_AUDIO_STAT,
 				 &val, 1)) {
-		u8 mask = SDVO_AUDIO_ELD_VALID | SDVO_AUDIO_PRESENCE_DETECT;
-
-		if ((val & mask) == mask)
+		if (val & SDVO_AUDIO_PRESENCE_DETECT)
 			pipe_config->has_audio = true;
 	}