dt-bindings: net: cdns,macb: add sama7d65 ethernet interface

This patch set adds all the supported FLEXCOMs for the SAMA7D65 SoC.
This also adds the GMAC interfaces and enables GMAC0 interface for
the SAMA7D65 SoC.

With the FLEXCOMs added to the SoC the MCP16502 and the MAC address
EEPROM are both added to flexcom10.

The dt-binding for USART is here [1]. And the dt-binding for DMA has
been applied here [2].

The original thread for this is here [3]. The applied changes have been
removed for this resend

[1] https://lore.kernel.org/20250306160318.vhPzJLjl19Vq9am9RRbuv5ddmQ6GCEND-YNvPKKtAtU@z
[2] https://lore.kernel.org/174065806827.367410.5368210992879330466.b4-ty@kernel.org
[3] https://lore.kernel.org/392b078b38d15f6adf88771113043044f31e8cd6.1743523114.git.Ryan.Wanner@microchip.com

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/35808b7cee5ba5b2ce55d741ae1ada0f1cd2f7cb.1750694691.git.Ryan.Wanner@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: ryan-wanner

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

@@ -62,6 +62,7 @@ properties:
       - items:
           - enum:
               - microchip,sam9x7-gem     # Microchip SAM9X7 gigabit ethernet interface
+              - microchip,sama7d65-gem   # Microchip SAMA7D65 gigabit ethernet interface
           - const: microchip,sama7g5-gem # Microchip SAMA7G5 gigabit ethernet interface
 
   reg: