[ALSA] Add snd-riptide driver for Conexant Riptide chip

Add snd-riptide driver for Conexant Riptide chip by Peter Gruber.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/Makefile b/sound/pci/Makefile
index a6c3cd5..daa4253 100644
--- a/sound/pci/Makefile
+++ b/sound/pci/Makefile
@@ -62,6 +62,7 @@
 	mixart/ \
 	nm256/ \
 	pcxhr/ \
+	riptide/ \
 	rme9652/ \
 	trident/ \
 	ymfpci/ \