On boards with ADSL instead of VDSL support we need to expect an `/sbin/dsl_cpe_control` instead of an `/sbin/vdsl_cpe_control` executable. Ref: https://forum.openwrt.org/t/dsl-line-stats/126580 Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit 111c551cdb8d14e8e5ef7c7a66ffdceb6d3cbb55)