[ARM] Remove an unnecessary cast (NFC)

getType() already returns Type *.

Author: kazutakahirata

llvm/lib/Target/ARM/ARMISelLowering.cpp

@@ -3403,7 +3403,7 @@ SDValue ARMTargetLowering::LowerConstantPool(SDValue Op,
   // position-independent addressing modes.
   if (Subtarget->genExecuteOnly()) {
     auto AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
-    auto T = const_cast<Type*>(CP->getType());
+    auto *T = CP->getType();
     auto C = const_cast<Constant*>(CP->getConstVal());
     auto M = DAG.getMachineFunction().getFunction().getParent();
     auto GV = new GlobalVariable(