dt-bindings: arm: ti: Add bindings for J721s2 SoC

Add binding for J721S2 SoC

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211207080904.14324-2-a-govindraju@ti.com

Documentation/devicetree/bindings/arm/ti/k3.yaml

@@ -53,6 +53,12 @@ properties:
               - ti,am642-sk
           - const: ti,am642
 
+      - description: K3 J721s2 SoC
+        items:
+          - enum:
+              - ti,j721s2-evm
+          - const: ti,j721s2
+
 additionalProperties: true
 
 ...