AP_RSSI: Use RC_Channels instead of hal.rcin

libraries/AP_RSSI/AP_RSSI.cpp

@@ -14,6 +14,7 @@
  */
 
 #include <AP_RSSI/AP_RSSI.h>
+#include <RC_Channel/RC_Channel.h>
 #include <utility> 
 
 extern const AP_HAL::HAL& hal;
@@ -129,7 +130,7 @@ float AP_RSSI::read_receiver_rssi()
             receiver_rssi = read_channel_rssi();
             break;
         case RssiType::RSSI_RECEIVER : {
-            int16_t rssi = hal.rcin->get_rssi();
+            int16_t rssi = RC_Channels::get_receiver_rssi();
             if (rssi != -1) {
                 receiver_rssi = rssi / 255.0;
             }
@@ -165,7 +166,7 @@ float AP_RSSI::read_pin_rssi()
 // read the RSSI value from a PWM value on a RC channel
 float AP_RSSI::read_channel_rssi()
 {
-    uint16_t rssi_channel_value = hal.rcin->read(rssi_channel-1);
+    uint16_t rssi_channel_value = RC_Channels::get_radio_in(rssi_channel-1);
     float channel_rssi = scale_and_constrain_float_rssi(rssi_channel_value, rssi_channel_low_pwm_value, rssi_channel_high_pwm_value);
     return channel_rssi;    
 }