[llvm] [AArch64] NFC: Replace CTTZ_ELTS predicate pattern with predicate. (PR #179909)

[Paul Walker via llvm-commits]

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@@ -1225,7 +1225,7 @@ def AArch64rshrnb_pf : PatFrags<(ops node:$rs, node:$i),
                             (int_aarch64_sve_rshrnb node:$rs, node:$i)]>;
 
 def AArch64CttzElts : SDNode<"AArch64ISD::CTTZ_ELTS", SDTypeProfile<1, 2,
-                             [SDTCisInt<0>, SDTCisVec<1>, SDTCisInt<2>]>, []>;
+                             [SDTCisInt<0>, SDTCisVec<1>, SDTCisVec<2>]>, []>;
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paulwalker-arm wrote:

```suggestion
                             [SDTCisInt<0>, SDTCisVec<1>, SDTCVecEltisVT<1,i1>, SDTCisSameAs<1,2>]>, []>;
```
I'm assuming we're happy to restrict this to just predicates, if not then I recommend `SDTCVecEltisVT<1,i1>, SDTCisSameNumEltsAs<1,2>`.

https://github.com/llvm/llvm-project/pull/179909