X64 Crankshaft: Start using LCallFunction, remove errors in it.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
===================================================================
--- src/x64/lithium-x64.h	(revision 6825)
+++ src/x64/lithium-x64.h	(working copy)
@@ -1313,16 +1313,13 @@
 };
 
 
-class LCallFunction: public LTemplateInstruction<1, 1, 0> {
+class LCallFunction: public LTemplateInstruction<1, 0, 0> {
  public:
-  explicit LCallFunction(LOperand* context) {
-    inputs_[0] = context;
-  }
+  LCallFunction() {}
 
   DECLARE_CONCRETE_INSTRUCTION(CallFunction, "call-function")
   DECLARE_HYDROGEN_ACCESSOR(CallFunction)
 
-  LOperand* context() { return inputs_[0]; }
   int arity() const { return hydrogen()->argument_count() - 2; }
 };