arm: dts: kirkwood*.dts: use SPDX-License-Identifier for boards 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 16:57:25 +01:00
commit e7822263a7
43 changed files with 43 additions and 136 deletions