x86: replace remaining __FUNCTION__ occurances

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 3335b45..af65b2d 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -661,7 +661,7 @@
 	if (delta < LG_CLOCK_MIN_DELTA) {
 		if (printk_ratelimit())
 			printk(KERN_DEBUG "%s: small delta %lu ns\n",
-			       __FUNCTION__, delta);
+			       __func__, delta);
 		return -ETIME;
 	}