ipmi: Add Phytium BT BMC driver support

[lyt31]

This patch adds a simple device driver to expose the BT interface on Phytium SoC as a character device. Such SOCs are commonly used as BMCs (BaseBoard Management Controllers) and this driver implements the BMC side of the BT interface.

[deepin-ci-robot]

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[Avenger-285714]

如上次沟通，请替换PHYTIUM为Phytium，和飞腾在每个子系统的全部提交保持一致

[lyt31]

已修改

[deepin-ci-robot]

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