As we have tplink-v2-header and tplink-v2-image recipes as well,
this patch renames the Device/tplink definition to Device/tplink-v1,
as it's using the tplink-v1-* commands. This should provide easier
distinction in the future.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>