Add efidev(4)/efirt(9)

[kevans]

Summary

Document efidev(4), provider of userland access to EFI Runtime Services. A link is created to efirtc(4), which handles the time-of-day clock side.

efirt(9) is the kernel side of this.

[kib]

You probably should mention that efirt is only available on amd64 and arm64.

share/man/man4/efidev.4

142

Perhaps this should go into efirt(9) instead.

[kevans]

share/man/man4/efidev.4

142

Ahh, good point. I'll split these up tonight, mention the availability, and resubmit.

[kevans]

Split efirt(9) out, leaving efidev(4)/efirtc(4) intact and adding a mention of efirt(9) there.

efirt(9)'s content has been restructured to fit section 9 a little better, but otherwise remains mostly the same as it was worded in efidev(4).

[kib]

share/man/man9/efirt.9

77

function returns 0 if ...

[bjk]

share/man/man9/efirt.9

242

typo: variable

[kevans]

Fix mis-phrasing and typos pointed out by @kib and @bjk, rewrite title and summary.