test/py: Fix pytest4 deprecation warnings

Fix the following spit from pytest:

u-boot/test/py/conftest.py:438: RemovedInPytest4Warning: MarkInfo objects are deprecated as they contain merged marks which are hard to deal with correctly.
  Please use node.get_closest_marker(name) or node.iter_markers(name).
  Docs: https://docs.pytest.org/en/latest/mark.html#updating-code
    for board in mark.args:

In both cases, the later suggestion is applicable.

Reviewed-by: Stephen Warren <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
Cc: Igor Opaniuk <[email protected]>
[trini: Update for current file with a few more cases, un-pin pytest in CI]
Tested-by: Simon Glass <[email protected]> [on sandbox]
Tested-by: Stephen Warren <[email protected]>
Signed-off-by: Tom Rini <[email protected]>

0 files changed, 0 insertions, 0 deletions