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>

sound/pci/echoaudio/echoaudio.h

@@ -189,6 +189,9 @@
 #define INDIGO			0x0090
 #define INDIGO_IO		0x00a0
 #define INDIGO_DJ		0x00b0
+#define DC8			0x00c0
+#define INDIGO_IOX		0x00d0
+#define INDIGO_DJX		0x00e0
 #define ECHO3G			0x0100