thermal/drivers/rcar_gen3_thermal: Add r8a779f0 support

Add support for R-Car S4.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20220705195520.2581-1-wsa+renesas@sang-engineering.com


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