net/mlx5: check sibling device configurations mismatch

net/mlx5: check sibling device configurations mismatch

The devices backed by mlx5 PMD might share the same multiport
Infiniband device context. It regards representors and slaves
of bonding device. These ports are spawned with devargs.
These patch check whether configuration deduced from these
devargs is compatible with configurations if devices
sharing the same context. It prevents the incorrect
whitelists, like:

-w 82:00.0,representor=0,dv_flow_en=1
-w 82:00.0,representor=1,dv_flow_en=0

The representors with indices [0-1] are supposed to spawned
over the same PCi device, but there is dv_flow_en parameter
mismatch.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>