[CGOpenMPRuntimeGPU] Replace unneeded use of CreatePointerBitCastOrAddrSpaceCast (NFC)

Opaque ptr cleanup effort (NFC)

Author: JOE1994

clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp

@@ -1418,9 +1418,7 @@ static llvm::Value *castValueToType(CodeGenFunction &CGF, llvm::Value *Val,
     return CGF.Builder.CreateIntCast(Val, LLVMCastTy,
                                      CastTy->hasSignedIntegerRepresentation());
   Address CastItem = CGF.CreateMemTemp(CastTy);
-  Address ValCastItem = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
-      CastItem, Val->getType()->getPointerTo(CastItem.getAddressSpace()),
-      Val->getType());
+  Address ValCastItem = CastItem.withElementType(Val->getType());
   CGF.EmitStoreOfScalar(Val, ValCastItem, /*Volatile=*/false, ValTy,
                         LValueBaseInfo(AlignmentSource::Type),
                         TBAAAccessInfo());