S390: Fix MathMaxMin's frame

MathMaxMin creates frame on stack without removing top bit of r14 on 31-bit.

R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com, bjaideep@ca.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2111263002
Cr-Commit-Position: refs/heads/master@{#37460}

src/s390/builtins-s390.cc

@@ -159,8 +159,7 @@ void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) {
       // Parameter is not a Number, use the ToNumber builtin to convert it.
       DCHECK(!FLAG_enable_embedded_constant_pool);
       FrameScope scope(masm, StackFrame::MANUAL);
-      __ Push(r14, fp, cp, r3);
-      __ la(fp, MemOperand(sp, 2 * kPointerSize));
+      __ PushStandardFrame(r3);
       __ SmiTag(r2);
       __ SmiTag(r6);
       __ Push(r2, r6, r7);