[ upstream commit b07b80fe ]

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: 5223a1f3 ("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>