lantiq-dsl: add 2 ugly workarounds for the IB to work

the IB tries to run the enable target on all init.d scripts.
It fails when including the dsl_control helper. Check for existence
prior to the include.

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

SVN-Revision: 41787

package/network/config/ltq-adsl-app/files/dsl_control

@@ -10,7 +10,7 @@ EXTRA_HELP="	status  Get DSL status information
 SERVICE_DAEMONIZE=1
 SERVICE_WRITE_PID=1
 
-. /lib/functions/lantiq_dsl.sh
+[ -f /lib/functions/lantiq_dsl.sh ] && . /lib/functions/lantiq_dsl.sh
 
 annex_b=10_00_10_00_00_04_00_00
 annex_bdmt=10_00_00_00_00_00_00_00

package/network/config/ltq-vdsl-app/files/dsl_control

@@ -11,7 +11,7 @@ EXTRA_HELP="	status  Get DSL status information
 SERVICE_DAEMONIZE=1
 SERVICE_WRITE_PID=1
 
-. /lib/functions/lantiq_dsl.sh
+[ -f /lib/functions/lantiq_dsl.sh ] && . /lib/functions/lantiq_dsl.sh
 XDSL_CTRL=vdsl_cpe_control
 
 # G.992.1 Annex A