UAVCAN is now in main RCs

ROMFS/px4fmu_common/init.d/rc.uavcan

-#!nsh
-#
-# UAVCAN initialization script.
-#
-
-#
-# Starting stuff according to UAVCAN_ENABLE value
-#
-if param greater UAVCAN_ENABLE 0
-then
-	if uavcan start
-	then
-		echo "[i] UAVCAN started"
-	else
-		echo "[i] ERROR: Could not start UAVCAN"
-		tone_alarm $TUNE_ERR
-	fi
-fi
-
-if param greater UAVCAN_ENABLE 1
-then
-	if uavcan start fw
-	then
-		echo "[i] UAVCAN servers started"
-	else
-		echo "[i] ERROR: Could not start UAVCAN servers"
-		tone_alarm $TUNE_ERR
-	fi
-fi