This reverts commit a5519b42cf.
Breaks "make bios" in roms/ as the kconfig version in seabios doesn't
support olddefconfig. Must have been be totally untested.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
When a new option is added that qemu does not know
about, the prudent thing is to use the default not
force it to "no".
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>