Always create dependencies for bind mounts

Always create dependencies for bind mounts

Dependencies were not created for _netdev mountpoints, the reasoning for this
is in the commit fc676b00, i.e. to avoid adding dependencies for network
mountpoints where What= appears like a path. Thus proposing this semantically
more correct condition when dependencies are added for _actual_ bind mounts
irrespectively of network flag.

Consequently it allows to add _netdev option to bind mounts, which includes
them in remote-fs.target, which simplifies configuration.