drivers/sensors: Add driver for the ST L3GD20 3 axis gyro

drivers/sensors/Kconfig

@@ -32,6 +32,13 @@ config BMP180
 	---help---
 		Enable driver support for the Bosch BMP180 barometer sensor.
 
+config SENSORS_L3GD20
+	bool "ST L3GD20 Gyroscope Sensor support"
+	default n
+	select SPI
+	---help---
+		Enable driver support for the ST L3GD20 gyroscope sensor.
+
 config SENSOR_KXTJ9
 	bool "Kionix KXTJ9 Accelerometer support"
 	default n

drivers/sensors/Make.defs

@@ -130,6 +130,10 @@ ifeq ($(CONFIG_LIS3MDL),y)
   CSRCS += lis3mdl.c
 endif
 
+ifeq ($(CONFIG_SENSORS_L3GD20),y)
+  CSRCS += l3gd20.c
+endif
+
 endif # CONFIG_SPI
 
 # Quadrature encoder upper half