0.5分支设置bf16报错

[qhzhuang]

Describe the bug/ 问题描述 (Mandatory / 必填)

• Hardware Environment(Ascend/GPU/CPU) / 硬件环境:
  910B4

• Software Environment / 软件环境 (Mandatory / 必填):
  ms2.7+mindnlp master

• Excute Mode / 执行模式 (Mandatory / 必填)(PyNative/Graph):

Please delete the mode not involved / 请删除不涉及的模式:
pynative

To Reproduce / 重现步骤 (Mandatory / 必填)
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior / 预期结果 (Mandatory / 必填)
A clear and concise description of what you expected to happen.

Screenshots/ 日志 / 截图 (Mandatory / 必填)
If applicable, add screenshots to help explain your problem.

Additional context / 备注 (Optional / 选填)
Add any other context about the problem here.