dt-bindings: phy: Allow BSD licensing of marvell,mmp3-hsic-phy.yaml

I wrote this binding and I'm fine with it being GPL + BSD dual-licensed,
as is recommended for new DT bindings.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200925235828.228626-3-lkundrak@v3.sk


Signed-off-by: Vinod Koul <vkoul@kernel.org>