[POWERPC] Replace remaining __FUNCTION__ occurrences

__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/math-emu/stfd.c b/arch/powerpc/math-emu/stfd.c
index 3f8c255..33a165c 100644
--- a/arch/powerpc/math-emu/stfd.c
+++ b/arch/powerpc/math-emu/stfd.c
@@ -7,7 +7,7 @@
 {
 #if 0
 #ifdef DEBUG
-	printk("%s: S %p, ea %p: ", __FUNCTION__, frS, ea);
+	printk("%s: S %p, ea %p: ", __func__, frS, ea);
 	dump_double(frS);
 	printk("\n");
 #endif