mac80211: add ABI_VERSION to fix rebuild of dependent packages after upgrades

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/kernel/mac80211/Makefile

@@ -98,6 +98,7 @@ define KernelPackage/cfg80211
   $(call KernelPackage/mac80211/Default)
   TITLE:=cfg80211 - wireless configuration API
   DEPENDS+= +iw +wireless-regdb
+  ABI_VERSION:=$(PKG_VERSION)-$(PKG_RELEASE)
   FILES:= \
 	$(PKG_BUILD_DIR)/compat/compat.ko \
 	$(PKG_BUILD_DIR)/net/wireless/cfg80211.ko
@@ -115,6 +116,7 @@ define KernelPackage/mac80211
   KCONFIG:=\
 	CONFIG_AVERAGE=y
   FILES:= $(PKG_BUILD_DIR)/net/mac80211/mac80211.ko
+  ABI_VERSION:=$(PKG_VERSION)-$(PKG_RELEASE)
   MENU:=1
 endef