PPC: [turbofan][ppc] Simplify {CallDescriptor::HasFunctionDescriptor}.

Port 5e7de6aa

R=mstarzinger@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=v8:9872
LOG=N

Change-Id: I2d2048643a4aba82b2f0e368afcf88c7e629c3d8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1876510Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64522}

src/codegen/ppc/macro-assembler-ppc.h

@@ -351,15 +351,15 @@ class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase {
   // return address (unless this is somehow accounted for by the called
   // function).
   void CallCFunction(ExternalReference function, int num_arguments,
-                     bool has_function_descriptor = kHasFunctionDescriptor);
+                     bool has_function_descriptor = true);
   void CallCFunction(Register function, int num_arguments,
-                     bool has_function_descriptor = kHasFunctionDescriptor);
+                     bool has_function_descriptor = true);
   void CallCFunction(ExternalReference function, int num_reg_arguments,
                      int num_double_arguments,
-                     bool has_function_descriptor = kHasFunctionDescriptor);
+                     bool has_function_descriptor = true);
   void CallCFunction(Register function, int num_reg_arguments,
                      int num_double_arguments,
-                     bool has_function_descriptor = kHasFunctionDescriptor);
+                     bool has_function_descriptor = true);
 
   // Call a runtime routine. This expects {centry} to contain a fitting CEntry
   // builtin for the target runtime function and uses an indirect call.