Add the &mac0/&mdio3/ethphy3 nodes to the NVIDIA MSX4 board dts to
enable BMC networking. These nodes were intentionally omitted in
commit f28674fab34f ("ARM: dts: aspeed: Add NVIDIA MSX4 HPM") at
Andrew Lunn's request, pending RGMII delay handling clarification.

Following his guidance on linux-aspeed [1], the U-Boot bootloader
has been modified to stop enabling MAC clock delays on the SoC
side. With phy-mode = "rgmii-id", the PHY now adds the required
~2ns delay without any double-delay from the MAC controller.

Tested on alon8 hardware: 1G link negotiation succeeds with this
change in coordination with the U-Boot patch [2].

[1] https://patch.msgid.link/eac09481-0ba1-4ac2-ad8c-d859822ff0d5@lunn.ch
[2] https://patch.msgid.link/20260504044702.2613879-1-andhsieh@nvidia.com

Ender Hsieh (1):
  ARM: dts: aspeed: msx4: enable BMC networking via MAC0

 .../dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts     | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

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2.34.1