dt: Add bindings for IDT VersaClock 5P49V5925

IDT VersaClock 5 5P49V6965 has 5 clock outputs, 4 fractional dividers.

Signed-off-by: Adam Ford <aford173@gmail.com>
Link: https://lkml.kernel.org/r/20200404161537.2312297-2-aford173@gmail.com


Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>