JIT: Avoid comparing regnums in GenTreeHWIntrinsic::Equals (dotnet#…

…110535)

Register numbers are not part of the syntax of JIT IR, so it does not
need to be compared for the purpose of this function. At the same time
we can hit asserts for nodes that aren't multi-reg nodes.

Fix dotnet#110316

src/coreclr/jit/gentree.cpp

@@ -27624,8 +27624,7 @@ void GenTreeHWIntrinsic::SetHWIntrinsicId(NamedIntrinsic intrinsicId)
 {
     return (op1->TypeGet() == op2->TypeGet()) && (op1->GetHWIntrinsicId() == op2->GetHWIntrinsicId()) &&
            (op1->GetSimdBaseType() == op2->GetSimdBaseType()) && (op1->GetSimdSize() == op2->GetSimdSize()) &&
-           (op1->GetAuxiliaryType() == op2->GetAuxiliaryType()) && (op1->GetRegByIndex(1) == op2->GetRegByIndex(1)) &&
-           OperandsAreEqual(op1, op2);
+           (op1->GetAuxiliaryType() == op2->GetAuxiliaryType()) && OperandsAreEqual(op1, op2);
 }
 
 void GenTreeHWIntrinsic::Initialize(NamedIntrinsic intrinsicId)