GPS_DUMP_COMM: dump all gps instances

msg/gps_dump.msg

@@ -3,6 +3,8 @@
 
 uint64 timestamp		# time since system start (microseconds)
 
+uint8 instance 		# Instance of GNSS reciever
+
 uint8 len			# length of data, MSB bit set = message to the gps device,
 				# clear = message from the device
 uint8[79] data		# data to write to the log

src/drivers/gps/gps.cpp

@@ -579,10 +579,6 @@ void GPS::initializeCommunicationDump()
 		return; //dumping disabled
 	}
 
-	if (_instance != Instance::Main) {
-		return;
-	}
-
 	_dump_from_device = new gps_dump_s();
 	_dump_to_device = new gps_dump_s();
 
@@ -608,6 +604,7 @@ void GPS::dumpGpsData(uint8_t *data, size_t len, bool msg_to_gps_device)
 	}
 
 	gps_dump_s *dump_data  = msg_to_gps_device ? _dump_to_device : _dump_from_device;
+	dump_data->instance = (uint8_t) _instance;
 
 	while (len > 0) {
 		size_t write_len = len;