eina_log: add parameter description on "eina_log_level_check"'s annotation

Summary:
In eina_log_level_check's annotation, parameter description is missing,
so warning is occurred on doxygen

Test Plan: API Doxygen Revision

Reviewers: raster, cedric, jpeg, myoungwoon, Jaehyun_Cho

Differential Revision: https://phab.enlightenment.org/D5375

src/lib/eina/eina_log.h

@@ -533,6 +533,8 @@ EAPI int  eina_log_level_get(void) EINA_WARN_UNUSED_RESULT;
 /**
  * @brief Determines if a given @p level should be logged.
  *
+ * @param level The log level to check
+ *
  * @return #EINA_TRUE if the @p level should be logged, else #EINA_FALSE.
  *
  * @see eina_log_level_set()