Clean up the usage of V8_TARGET_ARCH_${arch} and V8_HOST_ARCH_${arch}

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
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 //
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 #include "v8.h"
 
-#if defined(V8_TARGET_ARCH_MIPS)
+#if V8_TARGET_ARCH_MIPS
 
 #include "bootstrapper.h"
 #include "code-stubs.h"
 #include "codegen.h"
 #include "regexp-macro-assembler.h"
 #include "stub-cache.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 7499 matching lines @@
   __ Addu(a1, sp, Operand(kNumSavedRegs * kPointerSize));
 
   // Align the stack if necessary.
   int frame_alignment = masm->ActivationFrameAlignment();
   if (frame_alignment > kPointerSize) {
     __ mov(t1, sp);
     ASSERT(IsPowerOf2(frame_alignment));
     __ And(sp, sp, Operand(-frame_alignment));
   }
 
-#if defined(V8_HOST_ARCH_MIPS)
+#if V8_HOST_ARCH_MIPS
   __ li(at, Operand(reinterpret_cast<int32_t>(&entry_hook_)));
   __ lw(at, MemOperand(at));
 #else
   // Under the simulator we need to indirect the entry hook through a
   // trampoline function at a known address.
   Address trampoline_address = reinterpret_cast<Address>(
       reinterpret_cast<intptr_t>(EntryHookTrampoline));
   ApiFunction dispatcher(trampoline_address);
   __ li(at, Operand(ExternalReference(&dispatcher,
                                       ExternalReference::BUILTIN_CALL,
@@ skipping 275 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS