Created attachment 241771 [details] dmesg_4.9.0-040900rc1-generic [ 1.848743] Failed to find cpu0 device node
Created attachment 241781 [details] lspci -vvnn
JYFI: Bug 180031 describes a similar issue
I wonder if these patches help: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1260133.html
Please retest with Linux Kernel 4.9-rc3, it fixed the issue for me.