[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/oss/trident.h b/sound/oss/trident.h
index 4713b49..ff30a1d 100644
--- a/sound/oss/trident.h
+++ b/sound/oss/trident.h
@@ -322,7 +322,7 @@
 #define VALIDATE_MAGIC(FOO,MAG)				\
 ({						  	\
 	if (!(FOO) || (FOO)->magic != MAG) { 		\
-		printk(invalid_magic,__FUNCTION__);	\
+		printk(invalid_magic,__func__);	\
 		return -ENXIO;			  	\
 	}					  	\
 })