eventdev: fix a return value comment

[ upstream commit b07b80f ]

The PMD info get API has a void return type. Remove the
@return 0 Success doxygen comment as it doesn't make sense here.

Fixes: 5223a1f ("eventdev: define southbound driver interface")

Reported-by: Fredrik A Lindgren <fredrik.a.lindgren@tietoevry.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>

lib/librte_eventdev/rte_eventdev_pmd.h

@@ -158,9 +158,6 @@ rte_event_pmd_is_valid_dev(uint8_t dev_id)
  *   Event device pointer
  * @param dev_info
  *   Event device information structure
- *
- * @return
- *   Returns 0 on success
  */
 typedef void (*eventdev_info_get_t)(struct rte_eventdev *dev,
 		struct rte_event_dev_info *dev_info);