tests: ctxless: make test cases work with linux v5.1
tests: ctxless: make test cases work with linux v5.1

Make all ctxless test cases work with the recent changes to gpio-mockup
introduced in linux v5.1.

Signed-off-by: Bartosz Golaszewski <e5d45fddd9040473413b909b802f629a971ad04c@baylibre.com>

brgl/libgpiod,brgl/libgpiod,brgl/libgpiod,brgl/libgpiod