Add group definition to event logger.

Add the tags required by doxygen for defining the group of the
kernel event logger.

Change-Id: I96ec6b6604da5a541ce8041e6fa3c324a03ff698
Signed-off-by: Yonattan Louise <yonattan.a.louise.mendoza@intel.com>

doc/doxygen.config

@@ -259,6 +259,7 @@ SEARCH_INCLUDES        = YES
 INCLUDE_PATH           =
 INCLUDE_FILE_PATTERNS  =
 PREDEFINED             = "CONFIG_SYS_CLOCK_EXISTS=y" \
+			 "CONFIG_KERNEL_EVENT_LOGGER=y" \
 			 "CONFIG_NANO_TIMEOUTS=y"
 EXPAND_AS_DEFINED      =
 SKIP_FUNCTION_MACROS   = NO

doc/reference/api.rst

@@ -48,6 +48,13 @@ Timers
    :project: Zephyr
    :content-only:
 
+Kernel Event Logger
+-------------------
+
+.. doxygengroup:: nanokernel_event_logger
+   :project: Zephyr
+   :content-only:
+
 Microkernel
 ***********
 

include/misc/kernel_event_logger.h

@@ -39,7 +39,14 @@
 #define KERNEL_EVENT_LOGGER_SLEEP_EVENT_ID                      0x0003
 #endif
 
+/**
+ * @brief Kernel Event Logger
+ * @defgroup nanokernel_event_logger Kernel Event Logger
+ * @{
+ */
+
 #ifndef _ASMLANGUAGE
+
 /**
  * Global variable of the ring buffer that allows user to implement
  * their own reading routine.
@@ -180,6 +187,10 @@ static inline void sys_k_event_logger_put_timed(uint16_t event_id) {};
 
 #endif /* _ASMLANGUAGE */
 
+/**
+* @}
+*/
+
 #endif /* CONFIG_KERNEL_EVENT_LOGGER */
 
 #endif /* __KERNEL_EVENT_LOGGER_H__ */