ALSA: replace CONFIG_PROC_FS with CONFIG_SND_PROC_FS

We may disable proc fs only for sound part, to reduce ALSA
memory footprint. So add CONFIG_SND_PROC_FS and replace the
old CONFIG_PROC_FSs in alsa code.

With sound proc fs disabled, we can save about 9KB memory
size on X86_64 platform.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
index 86e2d91..0ca9d72 100644
--- a/sound/core/sound_oss.c
+++ b/sound/core/sound_oss.c
@@ -207,7 +207,7 @@
  *  INFO PART
  */
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_SND_PROC_FS
 static const char *snd_oss_device_type_name(int type)
 {
 	switch (type) {
@@ -259,4 +259,4 @@
 	entry->c.text.read = snd_minor_info_oss_read;
 	return snd_info_register(entry); /* freed in error path */
 }
-#endif /* CONFIG_PROC_FS */
+#endif /* CONFIG_SND_PROC_FS */