Commit [1] moved the FW image of the gb200nvl-bmc machine and broke
the associated functional test. Fix that.
[1] 52451b2472
Cc: Ed Tanous <etanous@nvidia.com>
Cc: Patrick Williams <patrick@stwcx.xyz>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/qemu-devel/20251222073351.166720-1-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>