!1497 merge fix/lb_min into br_aikg
[AKG-MLIR] fix point loop lb by min
Created-by: super_yuziyu
Commit-by: sasaki
Merged-by: corleoneliu
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**What type of PR is this?**
> /kind bug</br>
**What does this PR do / why do we need it**:
**Which issue(s) this PR fixes**:fix point loop lb by min
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Fixes #
**Special notes for your reviewers**:
See merge request: mindspore/akg!1497
