Revert "wireless: Support of IFLA_INFO_KIND rtnl attribute"

Revert "wireless: Support of IFLA_INFO_KIND rtnl attribute"

This reverts commit fddb19b536bbcbc48d5e3170517e5b33244e039e.

Oliver reported that it breaks network-manager, for some reason with
this patch NM decides that the device isn't wireless but "generic"
(ethernet), sees no carrier (as expected with wifi) and fails to do
anything else with it.

Revert this to unbreak userspace.

Reported-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>