[ALSA] oxygen: separate out hardware initialization code

Create separate functions for the code that initializes the hardware, as
opposed to initializing internal driver state, so that they can be
reused for resume support.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/oxygen/hifier.c

@@ -68,15 +68,22 @@ static void update_ak4396_volume(struct oxygen *chip)
 	ak4396_write(chip, AK4396_RCH_ATT, chip->dac_volume[1]);
 }
 
+static void hifier_registers_init(struct oxygen *chip)
+{
+	struct hifier_data *data = chip->model_data;
+
+	ak4396_write(chip, AK4396_CONTROL_1, AK4396_DIF_24_MSB | AK4396_RSTN);
+	ak4396_write(chip, AK4396_CONTROL_2, data->ak4396_ctl2);
+	ak4396_write(chip, AK4396_CONTROL_3, AK4396_PCM);
+	update_ak4396_volume(chip);
+}
+
 static void hifier_init(struct oxygen *chip)
 {
 	struct hifier_data *data = chip->model_data;
 
 	data->ak4396_ctl2 = AK4396_SMUTE | AK4396_DEM_OFF | AK4396_DFS_NORMAL;
-	ak4396_write(chip, AK4396_CONTROL_1, AK4396_DIF_24_MSB | AK4396_RSTN);
-	ak4396_write(chip, AK4396_CONTROL_2, data->ak4396_ctl2);
-	ak4396_write(chip, AK4396_CONTROL_3, AK4396_PCM);
-	update_ak4396_volume(chip);
+	hifier_registers_init(chip);
 
 	snd_component_add(chip->card, "AK4396");
 	snd_component_add(chip->card, "CS5340");