[APR-6371]create XFRM device instead of tun if possible

[APR-6371]create XFRM device instead of tun if possible

  If we can create XFRM vitrual device,
  it is possible to link it to CHILD_SA.
  It can allow to receive data packets
  after binding to created adapter.
  Note: adapter index will start with 10, i.e epdg10,
  in case successful creation.

Change-Id: I47414bda1748bfda858e2395e4ce2ded7b50ac77
Signed-off-by: Denis Vinogradov <denis.vinogradov@samsung.com>