FreeBSD_HEAD_i386 - Build #4602 - Fixed

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FreeBSD_HEAD_i386 - Build #4602 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/4602/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/4602/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/4602/console

Change summaries:

311678 by adrian:
[net80211] add roaming parameters for 11ac.

These are mostly placeholders for now.

311677 by adrian:
[net80211] use the correct freq2 field when populating VHT operation element.

Whilst here, leave a TODO comment so I revisit this routine in the context
of hostap operation probe requests for IBSS/mesh.

311675 by cem:
iso_rrip.h: Hide kernel definitions from makefs(8)

Reported by:	O. Hartmann <ohartmann at walstatt.org>