Update NEON compiler defines to use SK_ prefix

include/core/SkPreConfig.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPreConfig_DEFINED
@@ skipping 179 matching lines @@
             #define SK_ARM_HAS_EDSP
         #endif
     #endif
 #endif
 
 // Disable ARM64 optimizations for iOS due to complications regarding gyp and iOS.
 #if defined(__aarch64__) && !defined(SK_BUILD_FOR_IOS)
     #define SK_CPU_ARM64
 #endif
 
-#if !defined(SK_ARM_HAS_NEON) && defined(__ARM_NEON__)
-    #define SK_ARM_HAS_NEON
-#endif
-
 //////////////////////////////////////////////////////////////////////
 
 #if !defined(SKIA_IMPLEMENTATION)
     #define SKIA_IMPLEMENTATION 0
 #endif
 
 #if defined(SKIA_DLL)
     #if defined(WIN32)
         #if SKIA_IMPLEMENTATION
             #define SK_API __declspec(dllexport)
@@ skipping 45 matching lines @@
  *
  * NOTE: Clang/ARM (r161757) does not support the 'optimize' attribute.
  */
 #if SK_HAS_ATTRIBUTE(optimize)
 #   define SK_ATTRIBUTE_OPTIMIZE_O1 __attribute__((optimize("O1")))
 #else
 #   define SK_ATTRIBUTE_OPTIMIZE_O1 /* nothing */
 #endif
 
 #endif