net: remove cdns,at32ap7000-macb device tree entry

The AVR32 architecture has been removed from the kernel in commit
26202873, hence clean out the
cdns,at32ap7000-macb compatible entry in Cadence macb Ethernet driver.

AVR32 architecture never supported device tree, hence this code was not
used by anybody.

Updated documentation to match the default entry, no users of
cdns,at32ap7000-macb in the kernel tree.
Signed-off-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>

Documentation/devicetree/bindings/net/cdns,macb.yaml

@@ -42,7 +42,6 @@ properties:
           - atmel,sama5d2-gem         # GEM IP (10/100) on Atmel sama5d2 SoCs
           - atmel,sama5d3-gem         # Gigabit IP on Atmel sama5d3 SoCs
           - atmel,sama5d4-gem         # GEM IP (10/100) on Atmel sama5d4 SoCs
-          - cdns,at32ap7000-macb      # Other 10/100 usage or use the generic form
           - cdns,np4-macb             # NP4 SoC devices
           - microchip,sama7g5-emac    # Microchip SAMA7G5 ethernet interface
           - microchip,sama7g5-gem     # Microchip SAMA7G5 gigabit ethernet interface
@@ -155,7 +154,7 @@ unevaluatedProperties: false
 examples:
   - |
     macb0: ethernet@fffc4000 {
-            compatible = "cdns,at32ap7000-macb";
+            compatible = "cdns,macb";
             reg = <0xfffc4000 0x4000>;
             interrupts = <21>;
             phy-mode = "rmii";

drivers/net/ethernet/cadence/macb_main.c

@@ -4770,7 +4770,6 @@ static const struct macb_config sama7g5_emac_config = {
 };
 
 static const struct of_device_id macb_dt_ids[] = {
-	{ .compatible = "cdns,at32ap7000-macb" },
 	{ .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
 	{ .compatible = "cdns,macb" },
 	{ .compatible = "cdns,np4-macb", .data = &np4_config },