[PATCH] test/py/tests/test_fpga.py: Correct check for legacy image format support

[Tom Rini]

On Wed, 03 Jul 2024 15:19:09 -0600, Tom Rini wrote:

> The build option to support images of type 'IMAGE_FORMAT_LEGACY' is
> CONFIG_LEGACY_IMAGE_FORMAT so update the pytest to check for the correct
> option.
> 
> 

Applied to u-boot/master, thanks!

-- 
Tom