wil6210: add change_beacon() driver callback

This allows updating IEs (e.g. from hostapd) when AP is already started

Change-Id: Iff59bb7dfee3721a0108fa954ed9dff2a4162b9d
Signed-off-by: Dedy Lansky <qca_dlansky@qca.qualcomm.com>
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Git-commit: 1bd922fce29168b8a7d5b53c7be89de87381896b
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git


Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>