MIPS[64]: Don't create a handle for a builtin.

Port https://chromium-review.googlesource.com/c/519267/.

R=bmeurer@chromium.org

Bug: v8:6048
Change-Id: Ic94a12b30967fd26ebfa0c6752475d0c013f81e4
Reviewed-on: https://chromium-review.googlesource.com/565400Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46514}

src/compiler/mips/code-generator-mips.cc

@@ -2896,8 +2896,7 @@ void CodeGenerator::AssembleArchTrap(Instruction* instr,
         __ Ret();
       } else {
         gen_->AssembleSourcePosition(instr_);
-        __ Call(handle(tasm()->isolate()->builtins()->builtin(trap_id),
-                       tasm()->isolate()),
+        __ Call(tasm()->isolate()->builtins()->builtin_handle(trap_id),
                 RelocInfo::CODE_TARGET);
         ReferenceMap* reference_map =
             new (gen_->zone()) ReferenceMap(gen_->zone());

src/compiler/mips64/code-generator-mips64.cc

@@ -3183,8 +3183,7 @@ void CodeGenerator::AssembleArchTrap(Instruction* instr,
         __ Ret();
       } else {
         gen_->AssembleSourcePosition(instr_);
-        __ Call(handle(tasm()->isolate()->builtins()->builtin(trap_id),
-                       tasm()->isolate()),
+        __ Call(tasm()->isolate()->builtins()->builtin_handle(trap_id),
                 RelocInfo::CODE_TARGET);
         ReferenceMap* reference_map =
             new (gen_->zone()) ReferenceMap(gen_->zone());