PPC/s390: [stubs] An easier way of defining a stub call interface descriptor.

Port a2fef3af

Original commit message:

    This CL introduces a DECLARE_DEFAULT_DESCRIPTOR macro that helps defining a
    CallInterfaceDescriptor in a cases where it is not important which registers
    to use for passing arguments. One can use such descriptors for new TurboFan stubs.

    HasPropertyDescriptor now uses the new machinery.

R=ishell@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2034773002
Cr-Commit-Position: refs/heads/master@{#36687}

src/ppc/interface-descriptors-ppc.cc

@@ -71,9 +71,6 @@ const Register MathPowIntegerDescriptor::exponent() {
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return r3; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return r6; }
 
-const Register HasPropertyDescriptor::ObjectRegister() { return r3; }
-const Register HasPropertyDescriptor::KeyRegister() { return r6; }
-
 void FastNewClosureDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r5};

src/s390/interface-descriptors-s390.cc

@@ -60,9 +60,6 @@ const Register MathPowIntegerDescriptor::exponent() {
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return r2; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return r5; }
 
-const Register HasPropertyDescriptor::ObjectRegister() { return r2; }
-const Register HasPropertyDescriptor::KeyRegister() { return r5; }
-
 void FastNewClosureDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r4};