[ALSA] oxygen: make SPI configuration configurable

Add a field to the model structure so that it is possible to have a card
where the SPI outputs 4 and 5 are used for an EEPROM.

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 66dee95..fb9cb36b 100644
--- a/sound/pci/oxygen/oxygen.h
+++ b/sound/pci/oxygen/oxygen.h
@@ -83,6 +83,7 @@
 	u8 record_from_dma_b;
 	u8 cd_in_from_video_in;
 	u8 dac_minimum_volume;
+	u8 function_flags;
 };
 
 /* oxygen_lib.c */