Flaky tests for vkms

[Vignesh Raman]

Hi Maintainers,

The patch introducing vkms driver testing in drm-ci has been submitted 
upstream 
(https://patchwork.kernel.org/project/dri-devel/patch/20230922171237.550762-3-helen.koike@collabora.com/)
We will send an update to this patch with new test results from the 
latest drm-misc-next.

There are some flaky tests reported for vkms with the latest tests.
# Board Name: vkms
# Failure Rate: 50
# IGT Version: 1.28-gd2af13d9f
# Linux Version: 6.7.0-rc3

Pipeline url:
https://gitlab.freedesktop.org/vigneshraman/linux/-/jobs/53081973

# Reported by deqp-runner
kms_cursor_legacy at cursorA-vs-flipA-legacy
kms_cursor_legacy at cursorA-vs-flipA-varying-size

Will add these tests in drivers/gpu/drm/ci/xfails/vkms-none-flakes.txt 
(https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/Documentation/gpu/automated_testing.rst#n70)

Please could you have a look at these test results and let us know if 
you need more information. Thank you.

Regards,
Vignesh