fix inclusion of functions.sh in dsl_fs init script

without this, the following error is seen during build:
./etc/init.d/dsl_fs: line 4: /lib/functions.sh: No such file or directory

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>

SVN-Revision: 42575

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 40715

* atm module needs to be loaded before linux-atm
* use absolute firmware paths
* extended validation
* add a script for mounting an optional firmware partition

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 40460