Change in coreboot[master]: mb/prodrive/hermes: Number Ethernet devices

[Angel Pons (Code Review)]

Attention is currently required from: Patrick Rudolph, Christian Walter, Arthur Heymans.
Hello build bot (Jenkins), Patrick Rudolph, Christian Walter, Arthur Heymans,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/58628

to look at the new patch set (#4).

Change subject: mb/prodrive/hermes: Number Ethernet devices
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mb/prodrive/hermes: Number Ethernet devices

The Prodrive Hermes mainboard has four i211 Ethernet NICs and an i210
Ethernet NIC, but their numbering isn't consistent with the PCIe root
port function numbers. With only a M.2 SSD plugged in, Linux uses the
following names:

PHY 0 ---> enp6s0
 PHY 1 ---> enp4s0
 PHY 2 ---> enp3s0
 PHY 3 ---> enp1s0
 PHY 4 ---> enp2s0

These names change after adding or removing PCIe devices in slots
connected to root ports that get enumerated before the NICs' root
ports, because the assignment of secondary bus numbers depends on
the enumeration order. Because of this, the "predictable" network
interface names are not at all predictable, which is awful.

To avoid this, describe the NICs using SMBIOS Type41 entries with the
correct instance numbers. With this patch, Linux uses these names:

PHY 0 ---> eno0
 PHY 1 ---> eno1
 PHY 2 ---> eno2
 PHY 3 ---> eno3
 PHY 4 ---> eno4

No matter what PCIe devices are present, these names don't change.

Change-Id: I7a527298f84172f9135006083ad7e748dcc27911
Signed-off-by: Angel Pons 
---
M src/mainboard/prodrive/hermes/Kconfig
M src/mainboard/prodrive/hermes/devicetree.cb
2 files changed, 16 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/58628/4