work around initobject breakage in pc80/Config.lb

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4366 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/pc80/Config.lb

@@ -18,6 +18,13 @@ dir vga
 
 object keyboard.o
 
+if CONFIG_CONSOLE_SERIAL8250
 	if CONFIG_USE_INIT
+		# We should check whether we're on x86, but our
+		# config tool has a problem with that. So we check
+		# for a flag that is only used when we want this symbol:
+		if USE_DCACHE_RAM
 			initobject serial.o
 		end
+	end
+end