PPC/AIX: Fixing parameter passing to builtins on AIX

Extra parameters passed to a builtin function in AIX were undefined.
Issue had to do with using LoadP instead of lwz to load this FieldMemOperand.

Change-Id: Ia21b691c64bee2fec1b3f4ec24ca6518c5ae61d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1687767
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#62511}

src/builtins/ppc/builtins-ppc.cc

@@ -2396,7 +2396,7 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   __ cmpli(r5, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel));
   __ beq(&dont_adapt_arguments);
   __ LoadP(r7, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
-  __ LoadP(r7, FieldMemOperand(r7, SharedFunctionInfo::kFlagsOffset));
+  __ lwz(r7, FieldMemOperand(r7, SharedFunctionInfo::kFlagsOffset));
   __ TestBitMask(r7, SharedFunctionInfo::IsSafeToSkipArgumentsAdaptorBit::kMask,
                  r0);
   __ bne(&skip_adapt_arguments, cr0);