dt-bindings: timer: renesas,cmt: Add r8a779f0 and generic Gen4 CMT support

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220713100603.3391-2-wsa+renesas@sang-engineering.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>