This will automatically derive the DTS name as in ath79 and thus
makes specifying DTS for every device obsolete.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
---
This patch only introduces the mechanism and is then followed by
commits with renames and Makefile adjustments per subtarget.
Eventually, those can be all squashed into a single commit or left
as they are to enhance overview.
402138d12d