[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/cs46xx/dsp_spos.c b/sound/pci/cs46xx/dsp_spos.c
index ac98917..445a448 100644
--- a/sound/pci/cs46xx/dsp_spos.c
+++ b/sound/pci/cs46xx/dsp_spos.c
@@ -439,6 +439,7 @@
 }
 
 
+#ifdef CONFIG_PROC_FS
 static struct dsp_symbol_entry *
 cs46xx_dsp_lookup_symbol_addr (struct snd_cs46xx * chip, u32 address, int symbol_type)
 {
@@ -912,6 +913,7 @@
 
 	return 0;
 }
+#endif /* CONFIG_PROC_FS */
 
 static int debug_tree;
 static void _dsp_create_task_tree (struct snd_cs46xx *chip, u32 * task_data,