PPC: [wasm] Update WasmCapiFunction offset

More instructions are being emitted with 242d58e3
hence the offset needs to be updated.

Change-Id: I892920837ca7d785eb423503921ee39134be1c0d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2079156Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#66502}

src/compiler/backend/ppc/code-generator-ppc.cc

@@ -1031,7 +1031,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       Label start_call;
       bool isWasmCapiFunction =
           linkage()->GetIncomingDescriptor()->IsWasmCapiFunction();
-      int offset = 9 * kInstrSize;
+      int offset = 20 * kInstrSize;
 #if defined(_AIX)
       // AIX/PPC64BE Linux uses a function descriptor
       int kNumParametersMask = kHasFunctionDescriptorBitMask - 1;
@@ -1041,7 +1041,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       // AIX may emit 2 extra Load instructions under CallCFunctionHelper
       // due to having function descriptor.
       if (has_function_descriptor) {
-        offset = 11 * kInstrSize;
+        offset = 22 * kInstrSize;
       }
 #endif
       if (isWasmCapiFunction) {