doxygen: enable AUTOBRIEF, drop \brief

Especially for short descriptions, it is annoying to have to type \brief for
every single API doc.

Drop all \brief and enable the AUTOBRIEF feature of doxygen, which always takes
the first sentence of an API doc as the brief description.

Change-Id: I11a8a821b065a128108641a2a63fb5a2b1916e87
diff --git a/include/osmocom/coding/gsm0503_coding.h b/include/osmocom/coding/gsm0503_coding.h
index 2f0e631..a9c59e4 100644
--- a/include/osmocom/coding/gsm0503_coding.h
+++ b/include/osmocom/coding/gsm0503_coding.h
@@ -8,7 +8,7 @@
  */
 
 /*! \file gsm0503_coding.h
- *  \brief GSM TS 05.03 coding
+ *  GSM TS 05.03 coding
  */
 
 #define GSM0503_GPRS_BURSTS_NBITS	(116 * 4)
diff --git a/include/osmocom/coding/gsm0503_interleaving.h b/include/osmocom/coding/gsm0503_interleaving.h
index a5d25ed..1463fb3 100644
--- a/include/osmocom/coding/gsm0503_interleaving.h
+++ b/include/osmocom/coding/gsm0503_interleaving.h
@@ -7,7 +7,7 @@
  */
 
 /*! \file gsm0503_interleaving.h
- *  \brief GSM TS 05.03 interleaving
+ *  GSM TS 05.03 interleaving
  */
 
 void gsm0503_xcch_deinterleave(sbit_t *cB, const sbit_t *iB);
diff --git a/include/osmocom/coding/gsm0503_mapping.h b/include/osmocom/coding/gsm0503_mapping.h
index 6e139bf..435c913 100644
--- a/include/osmocom/coding/gsm0503_mapping.h
+++ b/include/osmocom/coding/gsm0503_mapping.h
@@ -7,7 +7,7 @@
  */
 
 /*! \file gsm0503_mapping.c
- *  \brief GSM TS 05.03 burst mapping
+ *  GSM TS 05.03 burst mapping
  */
 
 void gsm0503_xcch_burst_unmap(sbit_t *iB, const sbit_t *eB,
diff --git a/include/osmocom/coding/gsm0503_parity.h b/include/osmocom/coding/gsm0503_parity.h
index f844720..2743bdb 100644
--- a/include/osmocom/coding/gsm0503_parity.h
+++ b/include/osmocom/coding/gsm0503_parity.h
@@ -7,7 +7,7 @@
  */
 
 /*! \file gsm0503_parity.h
- *  \brief GSM TS 05.03 parity
+ *  GSM TS 05.03 parity
  */
 
 const struct osmo_crc64gen_code gsm0503_fire_crc40;
diff --git a/include/osmocom/coding/gsm0503_tables.h b/include/osmocom/coding/gsm0503_tables.h
index 4622cae..f8c43c6 100644
--- a/include/osmocom/coding/gsm0503_tables.h
+++ b/include/osmocom/coding/gsm0503_tables.h
@@ -8,7 +8,7 @@
  */
 
 /*! \file gsm0503_tables.h
- *  \brief GSM TS 05.03 tables
+ *  GSM TS 05.03 tables
  */
 
 extern const ubit_t gsm0503_pdtch_hl_hn_ubit[4][8];