ALSA: hda - proc - show which I/O NID is associated to PCM device

Output something like:

Node 0x02 [Audio Output] wcaps 0x11: Stereo
  Device: name="ALC888 Analog", type="Audio", device=0, substream=0
  Converter: stream=0, channel=0
  ...

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.h

@@ -894,6 +894,7 @@ int snd_hda_codec_build_controls(struct hda_codec *codec);
 /*
  * PCM
  */
+extern const char *snd_hda_pcm_type_name[];
 int snd_hda_build_pcms(struct hda_bus *bus);
 int snd_hda_codec_build_pcms(struct hda_codec *codec);
 void snd_hda_codec_setup_stream(struct hda_codec *codec, hda_nid_t nid,