dt-bindings: add StarFive Technology Co. Ltd.

dt-bindings: add StarFive Technology Co. Ltd.

Add vendor prefix for StarFive Technology Co. Ltd [1]. StarFive was
formed in 2018 and has now produced their first SoC, the JH7100, which
contains 64-bit RISC-V cores [2]. It used in the BeagleV Starlight [3].

[1] https://starfivetech.com/site/company
[2] https://github.com/starfive-tech/beaglev_doc
[3] https://github.com/beagleboard/beaglev-starlight

Signed-off-by: Drew Fustini <drew@beagleboard.org>
Link: https://lore.kernel.org/r/20210531070415.269667-1-drew@beagleboard.org
Signed-off-by: Rob Herring <robh@kernel.org>