ltq-vdsl-app: sync annex option between from ADSL package

The detailed annex option were only available in the danube DSL app
including the activation of G.992.2 Annex A (ADSL Lite). This is now
also added to the vdsl app for the vrx200.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 48946