ALSA: hda - Fix typos in snd_hdac_regmap_*() documents

Fixes the wrong reference names to regmap amp functions.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/hda_regmap.h

@@ -67,7 +67,7 @@ int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
  * @reg: verb to write
  * @val: value to write
  *
- * For writing an amp value, use snd_hda_regmap_amp_update().
+ * For writing an amp value, use snd_hdac_regmap_update_amp().
  */
 static inline int
 snd_hdac_regmap_write(struct hdac_device *codec, hda_nid_t nid,
@@ -85,7 +85,7 @@ snd_hdac_regmap_write(struct hdac_device *codec, hda_nid_t nid,
  * @mask: bit mask to update
  * @val: value to update
  *
- * For updating an amp value, use snd_hda_regmap_amp_update().
+ * For updating an amp value, use snd_hdac_regmap_update_amp().
  */
 static inline int
 snd_hdac_regmap_update(struct hdac_device *codec, hda_nid_t nid,