it looks that the PCI enumeration of the LAN chip works fine, but then the register access fails.
So lspci -vvnn lists the Realtec LAN [10ec/8168] correct, but network test fails to access the register.
It's not possible to read out the MAC address. 0xFF on all places will be returned.
I have attached the coreboot log file.
On line 375 PCI: 01:00.0 [10ec/8168] enabled shows the bus.
On line 994 down I can see assertion fails on AmdInitLate process.
What does this mean? Can you help?