cpu/esp*: fix doxygen grouping warnings

Signed-off-by: Jean-Pierre De Jesus DIAZ <me@jeandudey.tech>

cpu/esp32/doc.txt

@@ -1538,4 +1538,5 @@ To start debugging, you have to connect to QEMU with command:
 
 @note
 QEMU for Xtensa ESP32 does not support interrupts. That is, once your application uses interrupts, e.g., timers, the application cannot be debugged using QEMU together with GDB.
+
 */

cpu/esp32/esp-eth/esp_eth_params.h

@@ -34,6 +34,7 @@
 /** The priority of the ESP-ETH netdev driver thread */
 #define ESP_ETH_PRIO         GNRC_NETIF_PRIO
 #endif
+/** @} */
 
 #ifdef __cplusplus
 extern "C" {
@@ -46,4 +47,4 @@ extern "C" {
 #endif /* MODULE_ESP_ETH || DOXYGEN */
 
 #endif /* ESP_ETH_PARAMS_H */
-/**@}*/
+/** @} */

cpu/esp32/include/can_params.h

@@ -70,3 +70,4 @@ static const can_conf_t candev_conf[] = {
 #endif
 
 #endif /* CAN_PARAMS_H */
+/** @} */

cpu/esp32/include/sdk_conf.h

@@ -188,3 +188,4 @@ extern "C" {
 
 #endif /* DOXYGEN */
 #endif /* SDK_CONF_H */
+/** @} */

cpu/esp8266/include/sdk_conf.h

@@ -84,3 +84,4 @@ extern "C" {
 
 #endif /* DOXYGEN */
 #endif /* SDK_CONF_H */
+/** @} */

cpu/esp_common/include/esp_common.h

@@ -131,3 +131,4 @@ extern "C" {
 #endif /* DOXYGEN */
 
 #endif /* ESP_COMMON_H */
+/** @} */

cpu/esp_common/include/esp_common_log.h

@@ -137,3 +137,4 @@ extern int ets_printf(const char *fmt, ...);
 #endif /* DOXYGEN */
 
 #endif /* ESP_COMMON_LOG_H */
+/** @} */

cpu/esp_common/include/sys/types.h

@@ -333,3 +333,4 @@ typedef long suseconds_t;
 
 #endif /* DOXYGEN */
 #endif /* SYS_TYPES_H */
+/** @} */