Don't worry about them; they're just the Linux-libre kernel telling you that
it can't load a free firmware or that the non-free firmware in the kernel was
removed (since the kernel is deblobbed). I get messages like that every time
I boot up my computer, running Parabola GNU/Linux with the latest
Linux-libre:
[ 3.993987] 0000:0c:00.0: Missing Free firmware
[ 3.994720] r8169 0000:0c:00.0 eth0: unable to load firmware patch
/*(DEBLOBBED)*/ (-22)
[ 4.004150] r8169 0000:0c:00.0 eth0: link down
[ 4.004184] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 4.004304] 0000:0d:00.0: Missing Free firmware
[ 4.004591] r8169 0000:0d:00.0 eth1: unable to load firmware patch
/*(DEBLOBBED)*/ (-22)
[ 4.016114] r8169 0000:0d:00.0 eth1: link down
[ 4.016146] r8169 0000:0d:00.0 eth1: link down
[ 4.016159] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[ 4.106366] vboxpci: IOMMU not found (not registered)
[ 5.668575] r8169 0000:0d:00.0 eth1: link up
[ 5.668586] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
