PPC: Fix '[strong] Function arity check should be based on required parameters'

src/ppc/builtins-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/codegen.h"
 #include "src/debug.h"
@@ skipping 1760 matching lines @@
     __ TestBit(r8,
 #if V8_TARGET_ARCH_PPC64
                SharedFunctionInfo::kStrongModeFunction,
 #else
                SharedFunctionInfo::kStrongModeFunction + kSmiTagSize,
 #endif
                r0);
     __ beq(&no_strong_error, cr0);
 
     // What we really care about is the required number of arguments.
-    __ lwa(r7, FieldMemOperand(r7, SharedFunctionInfo::kLengthOffset));
+    __ lwz(r7, FieldMemOperand(r7, SharedFunctionInfo::kLengthOffset));
 #if V8_TARGET_ARCH_PPC64
     // See commment near kLenghtOffset in src/objects.h
     __ srawi(r7, r7, kSmiTagSize);
 #else
     __ SmiUntag(r7);
 #endif
     __ cmp(r3, r7);
     __ bge(&no_strong_error);
 
     {
@@ skipping 71 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_PPC