Fix a typo in the warning message displayed to users, don't print the message when running inside qtest and don't mention a specific QEMU version for the deprecation. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>