[build] Fix a clang warning

src/ppc/disasm-ppc.cc

Index: src/ppc/disasm-ppc.cc
diff --git a/src/ppc/disasm-ppc.cc b/src/ppc/disasm-ppc.cc
index baba14643f9ad02ae0a14a4e65446d5692c4402b..7d4e378d47ffab57403809b081875ad83e194ff3 100644
--- a/src/ppc/disasm-ppc.cc
+++ b/src/ppc/disasm-ppc.cc
@@ -1401,7 +1401,7 @@ namespace disasm {
 
 
 const char* NameConverter::NameOfAddress(byte* addr) const {
-  v8::internal::SNPrintF(tmp_buffer_, "%p", addr);
+  v8::internal::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr));
   return tmp_buffer_.start();
 }
 
@@ -1461,7 +1461,7 @@ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) {
     buffer[0] = '\0';
     byte* prev_pc = pc;
     pc += d.InstructionDecode(buffer, pc);
-    v8::internal::PrintF(f, "%p    %08x      %s\n", prev_pc,
+    v8::internal::PrintF(f, "%p    %08x      %s\n", static_cast<void*>(prev_pc),
                          *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }