tests/functional/arm: Add helper to generate OTP images

Add a small helper that generates OTP images at test time. This lets
multiple test cases create default OTP contents without shipping prebuilt
fixtures and keeps the tests self-contained.

Signed-off-by: Kane-Chen-AS <kane_chen@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250917035917.4141723-2-kane_chen@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
1 file changed