wireless: replace __FUNCTION__ with __func__

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ipw2100.c b/drivers/net/wireless/ipw2100.c
index 19a401c..bca7481 100644
--- a/drivers/net/wireless/ipw2100.c
+++ b/drivers/net/wireless/ipw2100.c
@@ -211,7 +211,7 @@
 do { \
 	if (ipw2100_debug_level & (level)) { \
 		printk(KERN_DEBUG "ipw2100: %c %s ", \
-                       in_interrupt() ? 'I' : 'U',  __FUNCTION__); \
+                       in_interrupt() ? 'I' : 'U',  __func__); \
 		printk(message); \
 	} \
 } while (0)