doc: fix doxygen groups for PPP
@ -7,8 +7,8 @@
*/
/**
* @defgroup net_ppp Header
* @ingroup net_ppp_hdr
* @defgroup net_ppphdr Point-to-Point Protocol Header
* @ingroup net_ppp
* @brief PPP header abstraction type and helper functions
* @{
*
@ -7,7 +7,7 @@
* @defgroup net_ppptypes PPP types
* @defgroup net_ppp Point-to-Point Protocol (PPP) Data Link Layer
* @ingroup net
* @brief PPP types