[IR] Implement equals call correct generation for MFVC

#KT-1179

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DataClassMembersGenerator.kt

@@ -128,7 +128,7 @@ abstract class DataClassMembersGenerator(
         fun generateEqualsMethodBody(properties: List<IrProperty>) {
             val irType = irClass.defaultType
 
-            if (!irClass.isSingleFieldValueClass) {
+            if (!irClass.isValue) {
                 +irIfThenReturnTrue(irEqeqeq(irThis(), irOther()))
             }
             +irIfThenReturnFalse(irNotIs(irOther(), irType))