Add MI300X Spec

[hliuca]

A MI300X spec has been provided. Thanks.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

:white_check_mark: hliuca
:x: Hui Liu

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[hliuca]

Hello, the agreement has been signed before. Thank you.