RC_Channel: Unify from print or println to printf.

libraries/RC_Channel/examples/RC_Channel/RC_Channel.cpp

@@ -19,7 +19,7 @@ static void print_radio_values();
 
 void setup()
 {
-    hal.console->println("ArduPilot RC Channel test");
+    hal.console->printf("ArduPilot RC Channel test\n");
 
     rc = RC_Channels::rc_channel(CH_1);
     

libraries/RC_Channel/examples/RC_UART/RC_UART.cpp

@@ -28,7 +28,7 @@ private:
 void RC_UART::setup()
 {
     hal.scheduler->delay(1000);
-    hal.console->println("RC_UART starting");
+    hal.console->printf("RC_UART starting\n");
     hal.UART->begin(baudrate, 512, 512);
     hal.rcout->set_freq(0xFF, RC_SPEED);
 }