[ALSA] sound: replace remaining __FUNCTION__ occurences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/init.c b/sound/core/init.c
index e3338d6..f045f7d 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -254,7 +254,7 @@
 	if (likely(df))
 		return df->disconnected_f_op->release(inode, file);
 
-	panic("%s(%p, %p) failed!", __FUNCTION__, inode, file);
+	panic("%s(%p, %p) failed!", __func__, inode, file);
 }
 
 static unsigned int snd_disconnect_poll(struct file * file, poll_table * wait)