A lot of flags are parts of a group but are documented alone.
The Doxygen syntax @{ and @} for grouping is used
to make flags appear together and have a common description.

Some Rx/Tx offload flags and RSS definitions are not grouped
because they need to be all properly documented first.

Signed-off-by: Thomas Monjalon <redacted>
---
 lib/ethdev/rte_ethdev.h | 71 ++++++++++++++++++++++++++++-------------
 1 file changed, 48 insertions(+), 23 deletions(-)

diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index d2b27c351f..0924c9fc68 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h

@@ -276,7 +276,7 @@ struct rte_eth_stats {
 	/**< Total number of queue packets received that are dropped. */
 };
 
-/**
+/**@{@name Link speed capabilities
  * Device supported speeds bitmap flags
  */
 #define ETH_LINK_SPEED_AUTONEG  (0 <<  0)  /**< Autonegotiate (all speeds) */

@@ -296,8 +296,9 @@ struct rte_eth_stats {
 #define ETH_LINK_SPEED_56G      (1 << 13)  /**<  56 Gbps */
 #define ETH_LINK_SPEED_100G     (1 << 14)  /**< 100 Gbps */
 #define ETH_LINK_SPEED_200G     (1 << 15)  /**< 200 Gbps */
+/**@}*/