include: drivers: sensor: enhance Doxygen documentation for INA2xx

Complete the Doxygen documentation for this sensor driver,
put in sensor_interface_ext group.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

include/zephyr/drivers/sensor/ina2xx.h

@@ -4,9 +4,22 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+/**
+ * @file
+ * @brief Extended public API for the INA2xx family of current/power monitors.
+ * @ingroup ina2xx_interface
+ */
+
 #ifndef ZEPHYR_INCLUDE_DRIVERS_SENSOR_INA2XX_H_
 #define ZEPHYR_INCLUDE_DRIVERS_SENSOR_INA2XX_H_
 
+/**
+ * @brief TI INA2xx current/power monitor family
+ * @defgroup ina2xx_interface INA2XX
+ * @ingroup sensor_interface_ext
+ * @{
+ */
+
 #include <zephyr/drivers/sensor.h>
 
 #ifdef __cplusplus
@@ -24,6 +37,7 @@ enum sensor_channel_ina2xx {
 	SENSOR_CHAN_INA2XX_CHARGE,
 };
 
+/** @brief Extended sensor attributes for the INA2xx family. */
 enum sensor_attribute_ina2xx {
 	/** ADC configuration **/
 	SENSOR_ATTR_ADC_CONFIGURATION = SENSOR_ATTR_PRIV_START,
@@ -33,4 +47,8 @@ enum sensor_attribute_ina2xx {
 }
 #endif
 
+/**
+ * @}
+ */
+
 #endif /* ZEPHYR_INCLUDE_DRIVERS_SENSOR_INA2XX_H_ */