ltq-vdsl/ltq-vdsl-app: clean up configure args

ltq-vdsl/ltq-vdsl-app: clean up configure args

The userspace application now uses the model=full option to match the
configuration of the kernel module. The source no longer contains SOAP
support, which was the primary reason to build only typical instead
of full before.

This makes several CLI commands, which were already supported in the
kernel module, available in the userspace application. For example, this
includes bbsg which allows to get information about VDSL2 bands.

Some previously applied build options were redundant. Disabling ADSL MIB
support is unnecessary, as it only applies to Danube. ADSL LED support
is no longer included in the source. ReTx counters are already included
with model type full.

This increases the size of the userspace application by approximately
15 kB (uncompressed). The kernel module does not change at all.

Signed-off-by: Jan Hoffmann <jan@3e8.eu>