[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/mffs.c b/arch/powerpc/math-emu/mffs.c
index f477c91..b0e2106 100644
--- a/arch/powerpc/math-emu/mffs.c
+++ b/arch/powerpc/math-emu/mffs.c
@@ -10,7 +10,7 @@
 	frD[1] = __FPU_FPSCR;
 
 #ifdef DEBUG
-	printk("%s: frD %p: %08x.%08x\n", __FUNCTION__, frD, frD[0], frD[1]);
+	printk("%s: frD %p: %08x.%08x\n", __func__, frD, frD[0], frD[1]);
 #endif
 
 	return 0;