dt-bindings: net: altera: tse: add an optional pcs register range

Some implementations of the TSE have their PCS as an external bloc,
exposed at its own register range. Document this, and add a new example
showing a case using the pcs and the new phylink conversion to connect
an sfp port to a TSE mac.

Signed-off-by: Maxime Chevallier <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/devicetree/bindings/net/altr,tse.yaml

···
       properties:
         reg:
           minItems: 6
+          maxItems: 7
         reg-names:
+          minItems: 6
           items:
             - const: control_port
             - const: rx_csr
···
             - const: rx_resp
             - const: tx_csr
             - const: tx_desc
+            - const: pcs
 
 unevaluatedProperties: false
 
 examples:
+  - |
+    tse_sub_0: ethernet@c0100000 {
+        compatible = "altr,tse-msgdma-1.0";
+        reg = <0xc0100000 0x00000400>,
+              <0xc0101000 0x00000020>,
+              <0xc0102000 0x00000020>,
+              <0xc0103000 0x00000008>,
+              <0xc0104000 0x00000020>,
+              <0xc0105000 0x00000020>,
+              <0xc0106000 0x00000100>;
+        reg-names = "control_port", "rx_csr", "rx_desc", "rx_resp", "tx_csr", "tx_desc", "pcs";
+        interrupt-parent = <&intc>;
+        interrupts = <0 44 4>,<0 45 4>;
+        interrupt-names = "rx_irq","tx_irq";
+        rx-fifo-depth = <2048>;
+        tx-fifo-depth = <2048>;
+        max-frame-size = <1500>;
+        local-mac-address = [ 00 00 00 00 00 00 ];
+        altr,has-supplementary-unicast;
+        altr,has-hash-multicast-filter;
+        sfp = <&sfp0>;
+        phy-mode = "sgmii";
+        managed = "in-band-status";
+    };
   - |
     tse_sub_1_eth_tse_0: ethernet@1,00001000 {
         compatible = "altr,tse-msgdma-1.0";