Several LoongArch mainboards have RTL NICs that want firmware or otherwise log soft error like [ 26.928046] r8169 0000:03:00.0: Unable to load firmware rtl_nic/rtl8168h-2.fw (-2) Add the necessary linux-firmware files to silence them. Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8082>