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: 5223a1f3b8de ("eventdev: define southbound driver interface")
Cc: stable@dpdk.org
Reported-by: Fredrik A Lindgren <fredrik.a.lindgren@tietoevry.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>