ALSA: hda - Use standard workqueue for unsol and jack events

The events that are handled by HD-audio drivers are no frequent and
urgent ones, so we can use the standard workqueue without any problem
nowadays.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.h

@@ -132,8 +132,6 @@ struct hda_bus {
 
 	/* unsolicited event queue */
 	struct hda_bus_unsolicited unsol;
-	char workq_name[16];
-	struct workqueue_struct *workq;	/* common workqueue for codecs */
 
 	/* assigned PCMs */
 	DECLARE_BITMAP(pcm_dev_bits, SNDRV_PCM_DEVICES);