doc: Add Doxygen group for OSMUX related functions

Change-Id: I87e08bd84236ae5d5c057bca96d122e568a6b52a

include/osmocom/netif/osmux.h

@@ -3,6 +3,14 @@
 
 #include <osmocom/core/endian.h>
 
+/*! \addtogroup osmux
+ *  @{
+ */
+
+/*! \file osmux.h
+ *  Osmocom multiplex protocol helpers
+ */
+
 /* OSmux header:
  *
  *	ft (3 bits):		0=signalling, 1=voice, 2=dummy
@@ -95,4 +103,6 @@ struct osmux_hdr *osmux_xfrm_output_pull(struct msgb *msg);
 
 void osmux_tx_sched(struct llist_head *list, void (*tx_cb)(struct msgb *msg, void *data), void *data);
 
+/*! @} */
+
 #endif

src/osmux.c

@@ -23,6 +23,15 @@
 
 #include <arpa/inet.h>
 
+/*! \addtogroup osmux Osmocom Multiplex Protocol
+ *  @{
+ */
+
+/*! \file osmux.c
+ *  \brief Osmocom multiplex protocol helpers
+ */
+
+
 /* This allows you to debug timing reconstruction in the output path */
 #if 0
 #define DEBUG_TIMING		0
@@ -921,3 +930,5 @@ int osmux_snprintf(char *buf, size_t size, struct msgb *msg)
 
 	return offset;
 }
+
+/*! @} */