dt-bindings: thermal: rcar-gen3-thermal: document R8A77980 bindings

Document the R-Car V3H (R8A77980) SoC in the Renesas R-Car gen3 thermal
bindings.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt

@@ -11,6 +11,7 @@ Required properties:
 			    - "renesas,r8a7795-thermal" (R-Car H3)
 			    - "renesas,r8a7796-thermal" (R-Car M3-W)
 			    - "renesas,r8a77965-thermal" (R-Car M3-N)
+			    - "renesas,r8a77980-thermal" (R-Car V3H)
 - reg			: Address ranges of the thermal registers. Each sensor
 			  needs one address range. Sorting must be done in
 			  increasing order according to datasheet, i.e.
@@ -20,7 +21,8 @@ Required properties:
 
 Optional properties:
 
-- interrupts           : interrupts routed to the TSC (3 for H3, M3-W and M3-N)
+- interrupts		: interrupts routed to the TSC (3 for H3, M3-W, M3-N,
+			  and V3H)
 - power-domain		: Must contain a reference to the power domain. This
 			  property is mandatory if the thermal sensor instance
 			  is part of a controllable power domain.