cfg80211: add and expose HE 6 GHz band capabilities

These capabilities cover what would otherwise be transported
in HT/VHT capabilities, but only a subset thereof that is
actually needed on 6 GHz with HE already present. Expose the
capabilities to userspace, drivers are expected to set them
as using the 6 GHz band (currently) requires HE capability.

Link: https://lore.kernel.org/r/20200528213443.244cd5cb9db8.Icd8c773277a88c837e7e3af1d4d1013cc3b66543@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: 223952177296c34d9c8de9cde33204caffe55725
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git


CRs-Fixed: 2743684
Change-Id: I38356f750b93cd7964b38e9d0983137b0db665c7
Signed-off-by: Vinita S. Maloo <vmaloo@codeaurora.org>