configure: Let --without-default-features disable vhost-kernel and vhost-vdpa

The vhost_kernel and vhost_vdpa variables should be pre-initialized with
the $default_feature setting so that these features get disabled when
the user runs the configure scripts with --without-default-features.

Reported-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210713093155.677589-5-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed