ARM: dts: qcom: Fix up APQ8060 DragonBoard license

This file is licensed in some kind of BSD manner, put it under
the combined GPL+BSD license like what the bindings use, it
seems most helpful.

I wrote the whole file so whatever. Those are my principles,
if you don't like them: I have others.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210409124954.320529-1-linus.walleij@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>