ALSA: hda/conexant - Add analog loopback mixing to CX20549

CX20549 has an aamixer widget at NID 0x17.  Let's enable it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_conexant.c

@@ -3423,6 +3423,7 @@ static int patch_conexant_auto(struct hda_codec *codec)
 	switch (codec->vendor_id) {
 	case 0x14f15045:
 		codec->single_adc_amp = 1;
+		spec->gen.mixer_nid = 0x17;
 		snd_hda_pick_fixup(codec, cxt5045_fixup_models,
 				   cxt5045_fixups, cxt_fixups);
 		break;