mac80211: disable building on kernel 6.6 temporarily

Currently mac80211 wifi drivers are using backports-6.5 which will
apparently cause build failure on kernel 6.6.

It has to be disabled for now until a newer version of backports is
used.

Signed-off-by: Weijie Gao <hackpascal@gmail.com>

package/kernel/mac80211/Makefile

@@ -45,6 +45,7 @@ define KernelPackage/mac80211/Default
   SUBMENU:=$(WMENU)
   URL:=https://wireless.wiki.kernel.org/
   MAINTAINER:=Felix Fietkau <nbd@nbd.name>
+  DEPENDS:=@!LINUX_6_6
 endef
 
 # config_pacakge: