[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/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index abac684..4c64560 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1288,7 +1288,7 @@
 	mutex_unlock(&codec->mutex);
 
 	dapm_power_widgets(codec, event);
-	dump_dapm(codec, __FUNCTION__);
+	dump_dapm(codec, __func__);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);