arm: dts: kirkwood*.dts: use SPDX-License-Identifier for board using GPL-2.0+

Follow the recent trend for the license description

Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
This commit is contained in:
Gregory CLEMENT 2018-03-15 17:06:28 +01:00
commit eb59e09203
9 changed files with 9 additions and 39 deletions