[torque] Fix TestBitFieldStore reading wrong parameter

Fixes test-torque/TestBitFieldStore to read the Smi parameter passed in
rather than the receiver which was always the global object.

Change-Id: Ie6b343ad7ef9393c211b0e7c8e1b7c1427e0aeb4
Bug: v8:10933
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2434327
Auto-Submit: Dan Elphick <delphick@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70154}

test/cctest/torque/test-torque.cc

@@ -673,12 +673,12 @@ TEST(TestBitFieldStore) {
   Isolate* isolate(CcTest::i_isolate());
   i::HandleScope scope(isolate);
   const int kNumParams = 1;
-  CodeAssemblerTester asm_tester(isolate, kNumParams);
+  CodeAssemblerTester asm_tester(isolate, kNumParams + 1);  // Include receiver.
   TestTorqueAssembler m(asm_tester.state());
   {
     // Untag the parameters to get a plain integer value.
-    TNode<Uint8T> val =
-        m.UncheckedCast<Uint8T>(m.Unsigned(m.SmiToInt32(m.Parameter(0))));
+    TNode<Uint8T> val = m.UncheckedCast<Uint8T>(
+        m.Unsigned(m.SmiToInt32(m.CAST(m.Parameter(1)))));
 
     m.TestBitFieldStore(val);
     m.Return(m.UndefinedConstant());