[ALSA] emu10k1 - Use enum for emu_model types

Use enum instead of digits for emu_model types.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 4474b4e..494648d 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1642,6 +1642,14 @@
 	void (*interrupt)(struct snd_emu10k1 *emu, unsigned int status);
 };
 
+enum {
+	EMU_MODEL_SB,
+	EMU_MODEL_EMU1010,
+	EMU_MODEL_EMU1010B,
+	EMU_MODEL_EMU1616,
+	EMU_MODEL_EMU0404,
+};
+
 struct snd_emu_chip_details {
 	u32 vendor;
 	u32 device;