[llvm] [RISCV][P-ext] Remove VXSAT from SHL/SHLR/SHA/SHAR. Add to PSAS and PSSA. (PR #195488)

[Brandon Wu via llvm-commits]

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@@ -1139,8 +1137,10 @@ let Predicates = [HasStdExtP, IsRV64] in {
   def PAS_WX   : RVPBinary_rr<0b0000, 0b01, 0b110, "pas.wx">;
   def PSA_WX   : RVPBinary_rr<0b0000, 0b11, 0b110, "psa.wx">;
 
+  let Defs = [VXSAT] in {
   def PSAS_WX  : RVPBinary_rr<0b0010, 0b01, 0b110, "psas.wx">;
   def PSSA_WX  : RVPBinary_rr<0b0010, 0b11, 0b110, "pssa.wx">;
+  }
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4vtomat wrote:

```suggestion
  } // Defs = [VXSAT]
```

https://github.com/llvm/llvm-project/pull/195488