Code cleanup; make several boards compile & link.
diff --git a/common/devices.c b/common/devices.c
index aa05533..7c85952 100644
--- a/common/devices.c
+++ b/common/devices.c
@@ -73,7 +73,7 @@
 
 	strcpy (dev.name, "serial");
 	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
-#if CONFIG_SERIAL_SOFTWARE_FIFO
+#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 	dev.putc = serial_buffered_putc;
 	dev.puts = serial_buffered_puts;
 	dev.getc = serial_buffered_getc;