DELL experts aren't very friendly people and don't answer to our questions properly, but dont be angry with them because they are very busy making amazing laptops that works fine on linux )))
I have been suffered of such error reports as you described above. I did experiment with my kernel config a lot during last months and found solution to solve the problem. You should add CONFIG_INTEL_PMC_CORE and (maybe) CONFIG_INTEL_PCH_THERMAL to your kernel config, rebuild kernel, reboot and voila!
I have Gentoo Linux running on Dell Vostro 5568 with kernel 4.11 and my dmesg reports virgin clear of any errors.