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/src/coding/gsm0503_parity.c b/src/coding/gsm0503_parity.c
index 171feb4..cc81702 100644
--- a/src/coding/gsm0503_parity.c
+++ b/src/coding/gsm0503_parity.c
@@ -27,7 +27,7 @@
 /*! \addtogroup parity
  *  @{
  *
- *  \brief GSM TS 05.03 parity
+ *  GSM TS 05.03 parity
  *
  *  This module contains parity/crc code definitions for the various
  *  parity/crc schemes as defined in 3GPP TS 05.03 / 45.003
@@ -35,7 +35,7 @@
 
 /*! \file gsm0503_parity.c */
 
-/*! \brief GSM (SACCH) parity (FIRE code)
+/*! GSM (SACCH) parity (FIRE code)
  *
  * g(x) = (x^23 + 1)(x^17 + x^3 + 1)
  *      = x^40 + x^26 + x^23 + x^17 + x^3 + a1
@@ -47,7 +47,7 @@
 	.remainder = 0xffffffffffULL,
 };
 
-/*! \brief GSM PDTCH CS-2, CS-3, CS-4 parity
+/*! GSM PDTCH CS-2, CS-3, CS-4 parity
  *
  * g(x) = x^16 + x^12 + x^5 + 1
  */
@@ -58,7 +58,7 @@
 	.remainder = 0xffff,
 };
 
-/*! \brief EDGE MCS header parity
+/*! EDGE MCS header parity
  *
  */
 const struct osmo_crc8gen_code gsm0503_mcs_crc8_hdr = {
@@ -68,7 +68,7 @@
 	.remainder = 0xff,
 };
 
-/*! \brief EDGE MCS data parity
+/*! EDGE MCS data parity
  *
  */
 const struct osmo_crc16gen_code gsm0503_mcs_crc12 = {
@@ -78,7 +78,7 @@
 	.remainder = 0x0fff,
 };
 
-/*! \brief GSM RACH parity
+/*! GSM RACH parity
  *
  * g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1
  */
@@ -89,7 +89,7 @@
 	.remainder = 0x3f,
 };
 
-/*! \brief GSM SCH parity
+/*! GSM SCH parity
  *
  * g(x) = x^10 + x^8 + x^6 + x^5 + x^4 + x^2 + 1
  */
@@ -100,7 +100,7 @@
 	.remainder = 0x3ff,
 };
 
-/*! \brief GSM TCH FR/HR/EFR parity
+/*! GSM TCH FR/HR/EFR parity
  *
  * g(x) = x^3 + x + 1
  */
@@ -111,7 +111,7 @@
 	.remainder = 0x7,
 };
 
-/*! \brief GSM TCH EFR parity
+/*! GSM TCH EFR parity
  *
  * g(x) = x^8 + x^4 + x^3 + x^2 + 1
  */
@@ -122,7 +122,7 @@
 	.remainder = 0x00,
 };
 
-/*! \brief GSM AMR parity
+/*! GSM AMR parity
  *
  * g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1
  */