arm64: dts: renesas: r9a09g087: Add TSU and thermal zones support

arm64: dts: renesas: r9a09g087: Add TSU and thermal zones support

The Renesas RZ/N2H (R9A09G087) SoC includes a Temperature Sensor Unit
(TSU). The device provides real-time temperature measurements for
thermal management, utilizing a single dedicated channel for temperature
sensing.

The TSU loads calibration data via SMC SIP.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20251126130356.2768625-10-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>