ALSA: aoa: clean up file names

This cleans up the apple onboard audio driver filenames.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/aoa/fabrics/Makefile b/sound/aoa/fabrics/Makefile
index 55fc5e7..da37c10 100644
--- a/sound/aoa/fabrics/Makefile
+++ b/sound/aoa/fabrics/Makefile
@@ -1 +1,3 @@
+snd-aoa-fabric-layout-objs += layout.o
+
 obj-$(CONFIG_SND_AOA_FABRIC_LAYOUT) += snd-aoa-fabric-layout.o