drm/ci: skip suspend tests for both msm-sc7180 machines

The commit ea489a3d983b ("drm/ci: add sc7180-trogdor-kingoftown")
dropped the msm-sc7180-skips.txt file, which disabled suspend-to-RAM
tests. However testing shows that STR tests still can fail. Restore the
skiplist, applying it to both limozeen and kingoftown machines.

Fixes: ea489a3d983b ("drm/ci: add sc7180-trogdor-kingoftown")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Vignesh Raman <vignesh.raman@collabora.com>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240216205650.2446153-1-dmitry.baryshkov@linaro.org