In order to avoid accessing iphlpapi.

We will need to move this code to ntdll or the server, but we can't access
iphlpapi from either. Even accessing a lower-level interface (i.e. ndis) is
hard—we have no good way to enumerate ndis devices from either (without
duplicating large parts of setupapi).
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>