Remove unnecessary #include that prevents cross-compilation with gcc 3.4.3 under Cygwin.

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2014 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

util/options/build_opt_tbl.c

@@ -1,6 +1,5 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/io.h>
 #include <string.h>
 #include <ctype.h>
 #include <errno.h>