Code cleanup; make several boards compile & link.
diff --git a/lib_ppc/board.c b/lib_ppc/board.c
index 0d2a00e..a85425c 100644
--- a/lib_ppc/board.c
+++ b/lib_ppc/board.c
@@ -874,7 +874,7 @@
 	/* Must happen after interrupts are initialized since
 	 * an irq handler gets installed
 	 */
-#if CONFIG_SERIAL_SOFTWARE_FIFO
+#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 	serial_buffered_init();
 #endif