fix debug variables on f3

src/main/drivers/pwm_output_dshot_shared.h

@@ -72,11 +72,13 @@ FAST_CODE void pwmWriteDshotInt(uint8_t index, uint16_t value)
     /*If there is a command ready to go overwrite the value and send that instead*/
     if (pwmDshotCommandIsProcessing()) {
         value = pwmGetDshotCommand(index);
+#ifdef USE_DSHOT_TELEMETRY
         // reset telemetry debug statistics every time telemetry is enabled
         if (value == DSHOT_CMD_SIGNAL_LINE_CONTINUOUS_ERPM_TELEMETRY) {
             dshotInvalidPacketCount = 0;
             readDoneCount = 0;
         }
+#endif
         if (value) {
             motor->requestTelemetry = true;
         }