checkpatch: check proper licensing of Devicetree bindings

According to Devicetree maintainers (see Link: below), the Devicetree
binding documents are preferrably licensed (GPL-2.0-only OR BSD-2-Clause).

Let's check that.  The actual check is a bit more relaxed, to allow more
liberal but compatible licensing (e.g.  GPL-2.0-or-later OR BSD-2-Clause).

Signed-off-by: Lubomir Rintel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Joe Perches <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Neil Armstrong <[email protected]>
Cc: Laurent Pinchart <[email protected]>,
Cc: Jonas Karlman <[email protected]>,
Cc: Jernej Skrabec <[email protected]>,
Cc: Mark Rutland <[email protected]>,
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>,
Link: https://lore.kernel.org/lkml/20200108142132.GA4830@bogus/
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions