PPC/s390: [cleanup] Convert some global enums to enum class

Port cc06b8c7

Original Commit Message:

    Convert StoreOrigin, TypeOfMode, SaveFPRegsMode and ArgvMode to
    enum classes with k-prefixed values.

R=cbruni@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I46993e6e846cf7c1f6b3d15ea0aaea3d5693bf4d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2887646Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74508}

src/builtins/ppc/builtins-ppc.cc

@@ -2556,7 +2556,7 @@ void Builtins::Generate_CEntry(MacroAssembler* masm, int result_size,
   }
 
   __ EnterExitFrame(
-      save_doubles, arg_stack_space,
+      save_doubles == SaveFPRegsMode::kSave, arg_stack_space,
       builtin_exit_frame ? StackFrame::BUILTIN_EXIT : StackFrame::EXIT);
 
   // Store a copy of argc in callee-saved registers for later.
@@ -2622,7 +2622,7 @@ void Builtins::Generate_CEntry(MacroAssembler* masm, int result_size,
                       ? no_reg
                       // r14: still holds argc (callee-saved).
                       : r14;
-  __ LeaveExitFrame(save_doubles, argc);
+  __ LeaveExitFrame(save_doubles == SaveFPRegsMode::kSave, argc);
   __ blr();
 
   // Handling of exception.

src/builtins/s390/builtins-s390.cc

@@ -2598,7 +2598,7 @@ void Builtins::Generate_CEntry(MacroAssembler* masm, int result_size,
 #endif
 
   __ EnterExitFrame(
-      save_doubles, arg_stack_space,
+      save_doubles == SaveFPRegsMode::kSave, arg_stack_space,
       builtin_exit_frame ? StackFrame::BUILTIN_EXIT : StackFrame::EXIT);
 
   // Store a copy of argc, argv in callee-saved registers for later.
@@ -2666,7 +2666,7 @@ void Builtins::Generate_CEntry(MacroAssembler* masm, int result_size,
                       ? no_reg
                       // r6: still holds argc (callee-saved).
                       : r6;
-  __ LeaveExitFrame(save_doubles, argc);
+  __ LeaveExitFrame(save_doubles == SaveFPRegsMode::kSave, argc);
   __ b(r14);
 
   // Handling of exception.