ALSA: oxygen: remove oxygen_model::private_data field

The number of DACs can now be deduced from the dac_channels_mixer field,
so the private_data field is no longer needed.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/oxygen/xonar_pcm179x.c b/sound/pci/oxygen/xonar_pcm179x.c
index b55149e..5ec8be3 100644
--- a/sound/pci/oxygen/xonar_pcm179x.c
+++ b/sound/pci/oxygen/xonar_pcm179x.c
@@ -381,7 +381,7 @@
 	data->pcm179x.generic.ext_power_reg = OXYGEN_GPI_DATA;
 	data->pcm179x.generic.ext_power_int_reg = OXYGEN_GPI_INTERRUPT_MASK;
 	data->pcm179x.generic.ext_power_bit = GPI_EXT_POWER;
-	data->pcm179x.dacs = chip->model.private_data ? 4 : 1;
+	data->pcm179x.dacs = chip->model.dac_channels_mixer / 2;
 
 	pcm1796_init(chip);
 
@@ -411,7 +411,7 @@
 	struct xonar_pcm179x *data = chip->model_data;
 
 	data->generic.output_enable_bit = GPIO_ST_OUTPUT_ENABLE;
-	data->dacs = chip->model.private_data ? 4 : 1;
+	data->dacs = chip->model.dac_channels_mixer / 2;
 	data->hp_gain_offset = 2*-18;
 
 	pcm1796_init(chip);
@@ -1191,7 +1191,6 @@
 		case GPIO_DB_H6:
 			chip->model.shortname = "Xonar HDAV1.3+H6";
 			chip->model.dac_channels_mixer = 8;
-			chip->model.private_data = 1;
 			break;
 		}
 		break;
@@ -1206,7 +1205,6 @@
 			chip->model.shortname = "Xonar ST+H6";
 			chip->model.dac_channels_pcm = 8;
 			chip->model.dac_channels_mixer = 8;
-			chip->model.private_data = 1;
 			break;
 		}
 		break;