ALSA: Echoaudio: add support for Indigo express cards

This patch adds support for IndigoIOx and IndigoDJx.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/echoaudio/echoaudio_dsp.h b/sound/pci/echoaudio/echoaudio_dsp.h
index e352f3a..cb7d75a 100644
--- a/sound/pci/echoaudio/echoaudio_dsp.h
+++ b/sound/pci/echoaudio/echoaudio_dsp.h
@@ -576,8 +576,13 @@
 #define E3G_ASIC_NOT_LOADED		0xffff
 #define E3G_BOX_TYPE_MASK		0xf0
 
-#define EXT_3GBOX_NC			0x01
-#define EXT_3GBOX_NOT_SET		0x02
+/* Indigo express control register values */
+#define INDIGO_EXPRESS_32000		0x02
+#define INDIGO_EXPRESS_44100		0x01
+#define INDIGO_EXPRESS_48000		0x00
+#define INDIGO_EXPRESS_DOUBLE_SPEED	0x10
+#define INDIGO_EXPRESS_QUAD_SPEED	0x04
+#define INDIGO_EXPRESS_CLOCK_MASK	0x17
 
 
 /*