Replace GPL license statements with SPDX license identifiers (GPL-2.0).
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Acked-by: NChanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NRob Herring <robh@kernel.org>