PPC/S390: Fix the value of kNumberOfSavedGpParamRegs

kNumberOfSavedGpParamRegs is based on the number of registers
defined under Generate_WasmCompileLazy within the builtins and not
the list under wasm-linkage.h.

More information can be found within the comments of this CL:
https://crrev.com/c/2656857

Change-Id: I9d2122545120c95b7686c98eb838ab25ea376bf1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2659756
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#72446}

src/execution/ppc/frame-constants-ppc.h

@@ -22,7 +22,7 @@ class EntryFrameConstants : public AllStatic {
 
 class WasmCompileLazyFrameConstants : public TypedFrameConstants {
  public:
-  static constexpr int kNumberOfSavedGpParamRegs = 7;
+  static constexpr int kNumberOfSavedGpParamRegs = 8;
   static constexpr int kNumberOfSavedFpParamRegs = 8;
 
   // FP-relative.

src/execution/s390/frame-constants-s390.h

@@ -22,7 +22,7 @@ class EntryFrameConstants : public AllStatic {
 
 class WasmCompileLazyFrameConstants : public TypedFrameConstants {
  public:
-  static constexpr int kNumberOfSavedGpParamRegs = 4;
+  static constexpr int kNumberOfSavedGpParamRegs = 5;
 #ifdef V8_TARGET_ARCH_S390X
   static constexpr int kNumberOfSavedFpParamRegs = 4;
 #else