ALSA: hda: fix: lock reg_lock before calling snd_hdac_bus_update_rirb

The patch is to fix commit 5e13cf6c
(ALSA: hda: add polling mode in snd_hdac_bus_get_response)
spin_lock_irq should be called before snd_hdac_bus_update_rirb.

Fixes: 5e13cf6c ("ALSA: hda: add polling mode in snd_hdac_bus_get_response")
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>