[llvm] [NFC][DecoderEmitter] Predicate generation code cleanup (PR #158140)

[Rahul Joshi via llvm-commits]

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@@ -1221,7 +1219,8 @@ bool DecoderTableBuilder::emitPredicateMatch(raw_ostream &OS,
                                              unsigned EncodingID) const {
   const ListInit *Predicates =
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jurahul wrote:

Done. I also added missing error checks that are in DecoderEmitter but missing in the emitMCPredicateCheck function.

https://github.com/llvm/llvm-project/pull/158140