The driver for the Realtek network chip is missing the required firmware files.

[philo-micas]

Description

When we verified the functionality of the M2-W6940-128QC device, we encountered the following error message:

2024-11-18-_15:53:54_Debian GNU/Linux 12 sonic ttyS0
2024-11-18-_15:53:54_
2024-11-18-_15:53:55_sonic login: [   11.724874] r8169 0000:04:00.0: firmware: failed to load rtl_nic/rtl8168h-2.fw (-2)
2024-11-18-_15:53:55_[   11.732707] firmware_class: See https://wiki.debian.org/Firmware for information about missing firmware
2024-11-18-_15:53:55_[   11.742265] r8169 0000:04:00.0: firmware: failed to load rtl_nic/rtl8168h-2.fw (-2)
2024-11-18-_15:53:55_[   11.750068] r8169 0000:04:00.0: Unable to load firmware rtl_nic/rtl8168h-2.fw (-2)

It seems that the issue is caused by the Realtek network chip driver missing the required firmware files.
We attempted to add the firmware-realtek package in the build environment, which can resolve this issue.
PR link：#21023

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