[ALSA] Clean up sound/pci/ac97/Makefile

Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/ac97/Makefile

@@ -3,16 +3,11 @@
 # Copyright (c) 2001 by Jaroslav Kysela <perex@perex.cz>
 #
 
-snd-ac97-codec-objs := ac97_codec.o ac97_pcm.o
-
-ifneq ($(CONFIG_PROC_FS),)
-snd-ac97-codec-objs += ac97_proc.o
-endif
+snd-ac97-codec-y := ac97_codec.o ac97_pcm.o
+snd-ac97-codec-$(CONFIG_PROC_FS) += ac97_proc.o
 
 snd-ak4531-codec-objs := ak4531_codec.o
 
 # Toplevel Module Dependency
 obj-$(CONFIG_SND_AC97_CODEC) += snd-ac97-codec.o
 obj-$(CONFIG_SND_ENS1370) += snd-ak4531-codec.o
-
-obj-m := $(sort $(obj-m))