PPC: Remove unnecessary dcheck

Change-Id: I1d342b80589bedb6365ef0c91ad156d71ecc0622
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2542982Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#71213}

src/compiler/backend/ppc/code-generator-ppc.cc

@@ -3927,7 +3927,6 @@ void CodeGenerator::AssembleReturn(InstructionOperand* additional_pop_count) {
     }
     __ Drop(argc_reg);
   } else if (additional_pop_count->IsImmediate()) {
-    DCHECK_EQ(Constant::kInt32, g.ToConstant(additional_pop_count).type());
     int additional_count = g.ToConstant(additional_pop_count).ToInt32();
     __ Drop(parameter_count + additional_count);
   } else if (parameter_count == 0) {