Add both the jz4760 and jz4760b, plus a property to use the internal divider on the b variant and document it. Signed-off-by: Christophe Branchereau <cbranchereau@gmail.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20210726082033.351533-6-cbranchereau@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>