Missing signoff in the drm-msm-lumag tree

Commits

769874594fe22 ("drm/ci: add rk3588-rock-5b")
6545c64843ac5 ("drm/ci: i915: cml: update runner tag") 9878b138ab72b ("drm/ci: reduce sm8350-hdk parallel jobs from 4 to 2")

are missing a Signed-off-by from their committers