[llvm] [AArch64][GISel] Allow import of DAG FCVT/CVTF patterns using fixedpoint immediate (PR #215812)

[Kieran B via llvm-commits]

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@@ -9324,6 +9344,14 @@ class fixedpoint_vec_f32<ValueType FloatVT>
     : ComplexPattern<FloatVT, 1, "SelectCVTFixedPointVec<32>">;
 class fixedpoint_vec_f16<ValueType FloatVT>
     : ComplexPattern<FloatVT, 1, "SelectCVTFixedPointVec<16>">;
+// This thing just allows us to change the type of the node produced. The imm
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kieroxide wrote:

This was moved during the patch for SelectionDAG. As it was not needed anymore, due to the new renderers, I moved it back to where it was before

https://github.com/llvm/llvm-project/pull/215812