Fix compilation for DOS and non-x86 targets.

Fixup for r1638.
Thanks to Idwer Vollering for testing.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>


git-svn-id: svn://flashrom.org/flashrom/trunk@1645 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1