PPC: Add the missing cmp instr for 32bit

Minor fix to original CL https://chromium-review.googlesource.com/527156
adding the cmp instr to set the condition code for 32bit.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2934553002
Cr-Commit-Position: refs/heads/master@{#45828}

src/builtins/ppc/builtins-ppc.cc

@@ -823,12 +823,8 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
   {
     Label loop, done_loop;
     __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
-#if V8_TARGET_ARCH_PPC64
     __ cmpi(r3, Operand::Zero());
     __ beq(&done_loop);
-#else
-    __ beq(&done_loop, cr0);
-#endif
     __ mtctr(r3);
     __ bind(&loop);
     __ push(ip);