MIPS: Remove extranous holder load in some prototype-chain checking cases

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index e99590545e24c36a2924031a2cca0cb8c60fdcf5..8d8cb588cec1fdf21d930bdb26b3ff21a3232311 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -2184,7 +2184,7 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
+class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 2> {
  public:
   LCheckPrototypeMaps(LOperand* temp, LOperand* temp2)  {
     temps_[0] = temp;