gnrc_ipv6: add config macros to config doc group

sys/include/net/gnrc/ipv6.h

@@ -46,6 +46,13 @@
 extern "C" {
 #endif
 
+
+/**
+ * @defgroup    net_gnrc_ipv6_conf  GNRC IPv6 compile configurations
+ * @ingroup     net_gnrc_ipv6
+ * @ingroup     config
+ * @{
+ */
 /**
  * @brief   Default stack size to use for the IPv6 thread
  */
@@ -85,6 +92,7 @@ extern "C" {
  */
 #define GNRC_IPV6_STATIC_LLADDR
 #endif /* DOXYGEN */
+/** @} */
 
 /**
  * @brief   The PID to the IPv6 thread.

sys/include/net/gnrc/ipv6/blacklist.h

@@ -30,12 +30,19 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup    net_gnrc_ipv6_blacklist_conf GNRC IPv6 address blacklisting compile configurations
+ * @ingroup     net_gnrc_ipv6_blacklist
+ * @ingroup     config
+ * @{
+ */
 /**
  * Maximum size of the blacklist.
  */
 #ifndef GNRC_IPV6_BLACKLIST_SIZE
 #define GNRC_IPV6_BLACKLIST_SIZE    (8)
 #endif
+/** @} */
 
 /**
  * @brief   Adds an IPv6 address to the blacklist.

sys/include/net/gnrc/ipv6/nib/conf.h

@@ -7,8 +7,9 @@
  */
 
 /**
- * @defgroup    net_gnrc_ipv6_nib_conf  Configuration macros
+ * @defgroup    net_gnrc_ipv6_nib_conf  GNRC IPv6 NIB compile configurations
  * @ingroup     net_gnrc_ipv6_nib
+ * @ingroup     config
  * @brief       Configuration macros for neighbor information base
  * @{
  *

sys/include/net/gnrc/ipv6/whitelist.h

@@ -28,12 +28,19 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup    net_gnrc_ipv6_whitelist_conf GNRC IPv6 address whitelisting compile configurations
+ * @ingroup     net_gnrc_ipv6_whitelist
+ * @ingroup     config
+ * @{
+ */
 /**
  * Maximum size of the whitelist.
  */
 #ifndef GNRC_IPV6_WHITELIST_SIZE
 #define GNRC_IPV6_WHITELIST_SIZE    (8)
 #endif
+/** @} */
 
 /**
  * @brief   Adds an IPv6 address to the whitelist.