[llvm-branch-commits] [lld] [llvm] [AMDGPU] Update data layout string to use the new pointer spec about null pointer value (PR #194101)

[Shilei Tian via llvm-branch-commits]

shiltian wrote:

* #194101 👈
* #183207
* `main`

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This stack of pull requests is managed by <a href="https://github.com/shiltian/sgh"><b>sgh</b></a>.
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https://github.com/llvm/llvm-project/pull/194101