Raptor Blackbird support: all upstream in op-build

Thanks to my most recent PR being merged, op-build v2.5 will have full support for the Raptor Blackbird! This includes support for the “IPL Monitor” that’s required to get fan control going.

Note that if you’re running Fedora 32 then you need some patches to buildroot to have it build, but if you’re building on something a little older, then upstream should build and work straight out of the box (err… git tree).

I also note that the work to get Secure Boot for an OS Kernel going is starting to make its way out for code reviews, so that’s something to look forward to (although without a TPM we’re going to need extra code).