[ALSA] oxygen: make all DMA channels configurable

Allow the card models to specify whether each of the hardware DMA
channels is used.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h
index fb9cb36b..9b0234d 100644
--- a/sound/pci/oxygen/oxygen.h
+++ b/sound/pci/oxygen/oxygen.h
@@ -80,7 +80,7 @@
 	void (*update_dac_volume)(struct oxygen *chip);
 	void (*update_dac_mute)(struct oxygen *chip);
 	const unsigned int *dac_tlv;
-	u8 record_from_dma_b;
+	u8 used_channels;
 	u8 cd_in_from_video_in;
 	u8 dac_minimum_volume;
 	u8 function_flags;