[turbofan] Fix overzealous reserving of lazy deopt space.

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

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/ppc/macro-assembler-ppc.h"
@@ skipping 1537 matching lines @@
     int current_pc = masm()->pc_offset();
     if (current_pc < last_lazy_deopt_pc_ + space_needed) {
       int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
       DCHECK_EQ(0, padding_size % v8::internal::Assembler::kInstrSize);
       while (padding_size > 0) {
         __ nop();
         padding_size -= v8::internal::Assembler::kInstrSize;
       }
     }
   }
-  MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8