dt-bindings: rng: convert OMAP and Inside-Secure HWRNG to yaml schema

Converts the RNG bindings for OMAP SoCs and Inside-Secure
HWRNG modules to YAML schema.

Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Link: https://lore.kernel.org/r/20210922085203.2547-1-j-choudhary@ti.com


Signed-off-by: Rob Herring <robh@kernel.org>