HW Relnotes: Improve Supported Architectures

[ziaee]

Summary

For the template, 14.2, and 13.5, increase consistency
by making the section names more similar. Remove the empty
ARM section.

[ziaee]

Rendered example:

[emaste]

I've wondered if we should use the order you have here, or go based on tier order (amd64, aarch64, i386, armv7, ...). Or maybe we don't need to think too much, and once i386 is retired the problem solves itself.

[ziaee]

I'm happy to redo it the other way, but I think having x86 and arm together like it's been makes sense.

[ziaee]

Should I add the support tier for all of these?

[emaste]

Thinking a bit more I'd go with what you have here, and we should revisit this just before 15.0 (which shouldn't have any 32-bit except for armv7 anyway).

[ziaee]

Sounds good, thanks!