[llvm] [RISCV][GISel] Add ZFA FP legalization and full tests for 9 insn (PR #118723)

[Craig Topper via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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topperc wrote:

This tests more than the legalizer. Put it in the llvm/test/CodeGen/RISCV/GlobalISel/ directory and name it half-zfa.ll like the SelectionDAG test.

https://github.com/llvm/llvm-project/pull/118723