New driver for the LIS3MDL magnetometer.

ROMFS/px4fmu_common/init.d/rc.sensors

@@ -1,6 +1,6 @@
 #!nsh
 #
-# Standard startup script for PX4FMU v1, v2, v3 onboard sensor drivers.
+# Standard startup script for PX4FMU v1, v2, v3, v4 onboard sensor drivers.
 #
 
 if ver hwcmp PX4FMU_V1
@@ -35,6 +35,11 @@ then
 	then
 	fi
 
+	# External I2C bus
+	if lis3mdl -X start
+	then
+	fi
+
 	# Internal I2C bus
 	if hmc5883 -C -T -I -R 4 start
 	then
@@ -96,6 +101,10 @@ then
 	then
 	fi
 
+	if lis3mdl -R 2 start
+	then
+	fi
+
 	# Internal SPI bus is rotated 90 deg yaw
 	if hmc5883 -C -T -S -R 2 start
 	then
@@ -163,6 +172,10 @@ then
 	if hmc5883 -C -T -X start
 	then
 	fi
+
+	if lis3mdl -R 2 start
+	then
+	fi
 fi
 
 if meas_airspeed start