[llvm] [RISCV] Change vector tuple type's TypeSize to scalable (PR #114329)

[Craig Topper via llvm-commits]

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@@ -63,6 +63,7 @@ class VTVecTup<int size, int nf, ValueType dummy_elt, int value>
   let NF = nf;
   let ElementType = dummy_elt;
   let isRISCVVecTuple = true;
+  let isScalable = true;
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topperc wrote:

I don't think you should to this. This field is misnamed. It should be called "isScalableVector"

https://github.com/llvm/llvm-project/pull/114329