[ia32,root] Update comment

Change-Id: I2b1eb33e4b7a7c5158bec02c60823669921b619d
Bug: v8:6666, v8:8015
Reviewed-on: https://chromium-review.googlesource.com/1238578Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56139}

src/builtins/ia32/builtins-ia32.cc

@@ -1427,7 +1427,7 @@ void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
   //  -- esp[12] : receiver
   // -----------------------------------
 
-  // 1. Load receiver into edi, argArray into ebx (if present), remove all
+  // 1. Load receiver into xmm0, argArray into edx (if present), remove all
   // arguments from the stack (including the receiver), and push thisArg (if
   // present) instead.
   {
@@ -1457,7 +1457,7 @@ void Builtins::Generate_FunctionPrototypeApply(MacroAssembler* masm) {
   }
 
   // ----------- S t a t e -------------
-  //  -- ebx    : argArray
+  //  -- edx    : argArray
   //  -- edi    : receiver
   //  -- esp[0] : return address
   //  -- esp[4] : thisArg