undo change to lea formation in favor of dotnet#1593

Author: AndyAyersMS

src/coreclr/src/jit/codegencommon.cpp

@@ -1375,12 +1375,6 @@ bool CodeGen::genCreateAddrMode(GenTree*  addr,
 
     if (op2->IsIntCnsFitsInI32() && (op2->gtType != TYP_REF) && FitsIn<INT32>(cns + op2->AsIntConCommon()->IconValue()))
     {
-        // Don't build address modes out of non-foldable constants
-        if (!op2->AsIntConCommon()->ImmedValCanBeFolded(compiler, addr->OperGet()))
-        {
-            return false;
-        }
-
         /* We're adding a constant */
 
         cns += op2->AsIntConCommon()->IconValue();