[llvm] [RISCV] Add sched model for XiangShan-NanHu (PR #70232)

[Craig Topper via llvm-commits]

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+//==- RISCVSchedXiangShanNanHu.td - XiangShan-NanHu Scheduling Definitions --*- tablegen -*-=//
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topperc wrote:

Does this line exceed 80 characters?

https://github.com/llvm/llvm-project/pull/70232