ALSA: info - Remove BKL

Use the fine-grained mutex for the assigned info object, instead.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/info.c b/sound/core/info.c
index d749a0d..fe83661 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -167,7 +167,7 @@
 
 	data = file->private_data;
 	entry = data->entry;
-	lock_kernel();
+	mutex_lock(&entry->access);
 	switch (entry->content) {
 	case SNDRV_INFO_CONTENT_TEXT:
 		switch (orig) {
@@ -196,7 +196,7 @@
 	}
 	ret = -ENXIO;
 out:
-	unlock_kernel();
+	mutex_unlock(&entry->access);
 	return ret;
 }