MFH: r517076

• (Really) update Intel microcode to 20190918. Note the previous commit did

not update GH_TAGNAME. Therefore, the actual microcode was still 20190618.

• Update AMD microcode to 20191021.

https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=2b016af

Approved by: ports-secteam (joneum)