datapath-windows: nuke non-netlink based interface

Signed-off-by: Nithin Raju <nithin@vmware.com>
Acked-by: Sorin Vinturis <svinturis@cloudbasesolutions.com>
Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
datpath-windows: include/OvsPub.h => ovsext/DpInternal.h

OvsPub.h is not longer the interface file that published the interface
of the kernel datapath to userspace. Nevertheless it is still being used
internal to the kernel datapath.

We rename the file for this reason.

Signed-off-by: Nithin Raju <nithin@vmware.com>
Acked-by: Sorin Vinturis <svinturis@cloudbasesolutions.com>
Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>