drivers/doc.txt : Add sub-groups

Added Compile Config subgroups for sensors, netdev, actuators,
storage,soft_periph and misc to Doxygen

drivers/doc.txt

@@ -72,3 +72,47 @@
  * @brief       Drivers for different kinds of devices that do not match any
  *              other category
  */
+
+/**
+ * @defgroup    config_drivers_netdev Network Device Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for external network devices
+ */
+
+/**
+ * @defgroup    config_drivers_sensors Sensor Device Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for Sensors
+ */
+
+/**
+ * @defgroup    config_drivers_actuators Actuator Device Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for actuating devices
+ */
+
+/**
+ * @defgroup    config_drivers_storage Storage Device Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for storage devices
+ */
+
+ /**
+ * @defgroup    config_drivers_display Display Device Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for display devices
+ */
+
+/**
+ * @defgroup    config_drivers_soft_periph Soft Peripheral Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for Software emulated
+ *              @ref drivers_periph for UART, SPI, etc
+ */
+
+/**
+ * @defgroup    config_drivers_misc Miscellaneous Device Configurations
+ * @ingroup     config
+ * @brief       Compile time configurations for different kinds of
+ *              devices that do not match any other category
+ */