[ALSA] Optimize for config without PROC_FS (pci drivers)

Optimize the code when compiled without CONFIG_PROC_FS for some pci drivers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/atiixp_modem.c b/sound/pci/atiixp_modem.c
index 73f1f2b..8d8fd5a 100644
--- a/sound/pci/atiixp_modem.c
+++ b/sound/pci/atiixp_modem.c
@@ -1156,6 +1156,7 @@
 #endif /* CONFIG_PM */
 
 
+#ifdef CONFIG_PROC_FS
 /*
  * proc interface for register dump
  */
@@ -1177,7 +1178,9 @@
 	if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
 		snd_info_set_text_ops(entry, chip, 1024, snd_atiixp_proc_read);
 }
-
+#else
+#define snd_atiixp_proc_init(chip)
+#endif
 
 
 /*