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/seq/seq_info.h b/sound/core/seq/seq_info.h
index 4892a7f..f8549f8 100644
--- a/sound/core/seq/seq_info.h
+++ b/sound/core/seq/seq_info.h
@@ -29,7 +29,7 @@
 void snd_seq_info_queues_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer);
 
 
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_SND_PROC_FS
 int snd_seq_info_init( void );
 int snd_seq_info_done( void );
 #else