ALSA: hda - Fix missing capture mixer for ALC861/660 codecs

The capture-related mixer elements are missing with ALC861/ALC660 codecs
when quirks are present, due to missing call of set_capture_mixer().

Reference: Novell bnc#567340
http://bugzilla.novell.com/show_bug.cgi?id=567340

Signed-off-by: Takashi Iwai <[e-mail]>
Cc: <[e-mail]>

sound/pci/hda/patch_realtek.c

···
 	spec->stream_digital_playback = &alc861_pcm_digital_playback;
 	spec->stream_digital_capture = &alc861_pcm_digital_capture;
 
+	if (!spec->cap_mixer)
+		set_capture_mixer(codec);
 	set_beep_amp(spec, 0x23, 0, HDA_OUTPUT);
 
 	spec->vmaster_nid = 0x03;