GPLv2-only devicetrees make reuse difficult for software components
licensed under a different license.

The consensus is that a GPL/X11 dual-license should allow all necessary
uses, so relicense the vfxxx.dtsi, vf500.dtsi and vf610.dtsi files to
this combination.

CCs were acquired using (updated some email addresses, commented out
bouncing email addresses with --):
git shortlog -sne --no-merges arch/arm/boot/dts/vf???.dtsi

--CC: Chao Fu <B44548@freescale.com>
CC: Cosmin Stoica <cosminstefan.stoica@freescale.com>
CC: Frank Li <Frank.Li@freescale.com>
CC: Fugang Duan <B38611@freescale.com>
--CC: Huang Shijie <b32955@freescale.com>
--CC: Jingchang Lu <jingchang.lu@freescale.com>
--CC: Xiubo Li <Li.Xiubo@freescale.com>
Acked-by: NShawn Guo <shawnguo@kernel.org>
Acked-by: NLucas Stach <l.stach@pengutronix.de>
Acked-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NCory Tusar <cory.tusar@pid1solutions.com>
Acked-by: NSanchayan Maity <maitysanchayan@gmail.com>
Acked-by: NBhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Acked-by: NYuan Yao <yao.yuan@freescale.com>
Signed-off-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>