[lantiq] Initial DSL framework

[lantiq] Initial DSL framework

- Removed ifx_cpe_control_init.sh (the old init script)
- Created dsl_control (/etc/init.d)
- tidied up start and stop
- stop calls dsl_notify before killing daemon
- has status and lucistat options to provide detail
- copes with daemon not running situation
- Updated package makefile to use new init script and to build cli support
- Provide a dsl_notify.sh script to cope with line up/down events

Signed-off-by: Lee Essen <lee.essen@nowonline.co.uk>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29881 3c298f89-4303-0410-b956-a3cf2f4a3e73