wil6210: add recovery for FW error while in AP mode

AP configuration is stored by the driver. Upon FW error, disconnect
notification is sent to user space for any associated stations. AP is
then internally restarted with the stored configuration.

Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Git-commit: e41ab937d47b3c1180057f72968bf62b487fc80f
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


Change-Id: I6306de4ef207c1e7ba67ba0510c364267b3c5c41
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Lior David <liord@codeaurora.org>