Latest microcode updates for Intel Skylake/Cascade Lake Scalable Platform CPUs

(family 6, model 85, steppings 4, 6, and 7; CPUID 0x50654/0x50656/0x50657)

are disabled on some systems as these updates may cause system instability;

microcode from the previous microcode-20200609 release is used instead.

Please refer to /usr/share/doc/microcode_ctl/caveats/06-55-0x-ipu-2020.2_readme

and /usr/share/doc/microcode_ctl/README.caveats for details.