[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>

arch/powerpc/math-emu/mtfsf.c

@@ -38,7 +38,7 @@ mtfsf(unsigned int FM, u32 *frB)
 	__FPU_FPSCR |= (frB[1] & mask);
 
 #ifdef DEBUG
-	printk("%s: %02x %p: %08lx\n", __FUNCTION__, FM, frB, __FPU_FPSCR);
+	printk("%s: %02x %p: %08lx\n", __func__, FM, frB, __FPU_FPSCR);
 #endif
 
 	return 0;