dim: Add dim rebase command
Since -fixes and -fixes-next (to a lesser extent) are rebasing trees in drm-misc, add a dim rebase command that sanity checks the upstream and adds SoB for the committer.
Changes in v2:
- s/validate_upstream_branch/validate_upstream_baseline/ (Daniel)
- Use check_conflicts instead of hand rolling (Daniel)
Cc: Boris Brezillon boris.brezillon@bootlin.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Signed-off-by: Sean Paul seanpaul@chromium.org
Edited by Sean Paul