fix llama multi-gpu case in 40 series
Author: PluteW
Pull request: yes

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Fixes # (issue)
When using transformers to dispatch llama in 2 4090 GPUs, there is an error about "Expected all tensors to be on the same device"， when I track this, I found the past_key_value may be in different device, which caused this problem.

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Comments:
Hi @PluteW, thanks for opening this PR! Running `make fixup` and pushing the changes should resolve the quality checks 

This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md) are likely to be ignored.