[Turbofan] Add Simd128 registers to RegisterConfiguration.

src/x87/assembler-x87.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 57 matching lines @@
   V(stX_0)                  \
   V(stX_1)                  \
   V(stX_2)                  \
   V(stX_3)                  \
   V(stX_4)                  \
   V(stX_5)                  \
   V(stX_6)                  \
   V(stX_7)
 
 #define FLOAT_REGISTERS DOUBLE_REGISTERS
+#define SIMD128_REGISTERS DOUBLE_REGISTERS
 
 #define ALLOCATABLE_DOUBLE_REGISTERS(V) \
   V(stX_0)                              \
   V(stX_1)                              \
   V(stX_2)                              \
   V(stX_3)                              \
   V(stX_4)                              \
   V(stX_5)
 
 // CPU Registers.
@@ skipping 1021 matching lines @@
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X87_ASSEMBLER_X87_H_