What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

/kind task
/kind feature

What does this PR do / why do we need it:
Fix the bug of randomly failing in fp16 networks tests

Which issue(s) this PR fixes:

Fixes [MS]{Lite[[Tod] detection network
https://e.gitee.com/mind_spore/issues/list?issue=I4DPC3 Fix Fp16 bug
Special notes for your reviewers: