47771d6756
All other boards require libfdt if it can be used (including for example i386/x86_64), so change the "imply" to "select" and always allow -dtb in qemu-system-xtensa. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>