Venus: Add `vn_physical_device_{features, properties}` for better organization
New extensions properties/feature are being put in the vn_physical_device
which is not ideal from a organization point of view.
Here the vn_physical_device_{features,properties}
are two new struct to
help the vn_physical_device
organzation.
Signed-off-by: Igor Torrente igor.torrente@collabora.com