[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>

sound/pci/als300.c

@@ -92,8 +92,8 @@
 
 #if DEBUG_CALLS
 #define snd_als300_dbgcalls(format, args...) printk(format, ##args)
-#define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __FUNCTION__)
-#define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __FUNCTION__)
+#define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __func__)
+#define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __func__)
 #else
 #define snd_als300_dbgcalls(format, args...)
 #define snd_als300_dbgcallenter()