cfg80211: handle 6 GHz capability of new station

Handle 6 GHz HE capability while adding new station. It will be used
later in mac80211 station processing.

Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Link: https://lore.kernel.org/r/1589399105-25472-2-git-send-email-rmanohar@codeaurora.org
Link: https://lore.kernel.org/r/20200528213443.b6b711fd4312.Ic9b97d57b6c4f2b28d4b2d23d2849d8bc20bd8cc@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: 43e64bf301fd8c54f0082d91c6ffd4de861baf96
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git


CRs-Fixed: 2743684
Change-Id: I79d7a6f1994ca7cd39b3c5f950a52e40cb769971
Signed-off-by: Vinita S. Maloo <vmaloo@codeaurora.org>