[llvm] [X86][MC] Support Enc/Dec for EGPR for promoted CRC32 (PR #76434)

[Shengchen Kan via llvm-commits]

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@@ -6699,28 +6699,30 @@ let Constraints = "$src1 = $dst" in {
                                    null_frag>, REX_W;
   }
 
+  let Predicates = [In64BitMode] in {
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KanRobert wrote:

This `let` is incorrect. You will override the default predicate `[HasCRC32]`

https://github.com/llvm/llvm-project/pull/76434