[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/platforms/cell/pervasive.c

@@ -65,7 +65,7 @@ static void cbe_power_save(void)
 		break;
 	default:
 		printk(KERN_WARNING "%s: unknown configuration\n",
-			__FUNCTION__);
+			__func__);
 		break;
 	}
 	mtspr(SPRN_TSC_CELL, thread_switch_control);