[all] PlaySound has now a repeat argument as PlayTrack

[stock] Flash saving in AUDIO code. Warning, I had to change some VOICE prompt numbers, check the tts.py to know which ones!
[Taranis] DSM2 protocol added when compiling with DSM2=PPM

src/protocols/pxx_arm.cpp

@@ -95,10 +95,14 @@ void putPcmPart(uint8_t value, unsigned int port)
   *pxxStreamPtr[port]++ = PxxValue[port] ;  // Output 0 for this time
 }
 
+#if defined(PCBTARANIS)
 void putPcmFlush(unsigned int port)
 {
   *pxxStreamPtr[port]++ = 18010 ;             // Past the 18000 of the ARR
 }
+#else
+#define putPcmFlush(...)
+#endif
 
 void putPcmBit(uint8_t bit, unsigned int port)
 {