doc: pytest: Use globing for test files

After the original series was merged, Quentin noted that we could handle
adding additional tests more easily by using the glob feature. Do so.

Suggested-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
1 file changed