package/linux: fix custom dts files handling

Custom dts files are still conditionally copied based on non existing
boolean. So it is currently not possible to use custom dts file(s) at all.

List of dts files is now iterated and files are copied into dedicated kernel arch dir.

Signed-off-by: Rafal Susz <rafal.susz@gmail.com>
Tested-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 54157c6c2d9fba5ad230294ae1c7dfc0032b1ede)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
1 file changed