dt-bindings: altera: document existing Cyclone 5 board compatibles

Several Cyclone 5 SoCFPGA based boards have additional board compatibles
which are not documented in the bindings.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>

Documentation/devicetree/bindings/arm/altera.yaml

@@ -13,11 +13,29 @@ properties:
   $nodename:
     const: "/"
   compatible:
+    oneOf:
+      - description: Arria 5 boards
+        items:
+          - const: altr,socfpga-arria5
+          - const: altr,socfpga
+
+      - description: Arria 10 boards
+        items:
+          - const: altr,socfpga-arria10
+          - const: altr,socfpga
+
+      - description: Cyclone 5 boards
         items:
           - enum:
-          - altr,socfpga-cyclone5
-          - altr,socfpga-arria5
-          - altr,socfpga-arria10
+              - altr,socfpga-cyclone5-socdk
+              - denx,mcvevk
+              - ebv,socrates
+              - macnica,sodia
+              - novtech,chameleon96
+              - samtec,vining
+              - terasic,de0-atlas
+              - terasic,socfpga-cyclone5-sockit
+          - const: altr,socfpga-cyclone5
           - const: altr,socfpga
 
 additionalProperties: true