cfg80211: add regulatory hint disconnect support

This adds a new regulatory hint to be used when we know all
devices have been disconnected and idle. This can happen
when we suspend, for instance. When we disconnect we can
no longer assume the same regulatory rules learned from
a country IE or beacon hints are applicable so restore
regulatory settings to an initial state.

Since driver hints are cached on the wiphy that called
the hint, those hints are not reproduced onto cfg80211
as the wiphy will respect its own wiphy->regd regardless.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index 47995b8..f873ee3 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -39,6 +39,7 @@
  * 	00 - World regulatory domain
  * 	99 - built by driver but a specific alpha2 cannot be determined
  * 	98 - result of an intersection between two regulatory domains
+ *	97 - regulatory domain has not yet been configured
  * @intersect: indicates whether the wireless core should intersect
  * 	the requested regulatory domain with the presently set regulatory
  * 	domain.