Make POST device configurable.

Change-Id: If92b50ab3888518228d2d3b76f5c50c4aef968dd
Signed-off-by: Idwer Vollering <vidwer@gmail.com>
Reviewed-on: http://review.coreboot.org/4561
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/include/cpu/x86/post_code.h

@@ -2,10 +2,10 @@
 #include <console/post_codes.h>
 
 
-#if CONFIG_IO_POST
+#if CONFIG_POST_IO
 #define post_code(value)        \
 	movb    $value, %al;    \
-	outb    %al, $CONFIG_IO_POST_PORT
+	outb    %al, $CONFIG_POST_IO_PORT
 
 #else
 #define post_code(value)