mt76: include generated mac80211 config file and add an appropriate define for mesh support (fixes #19474)

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

SVN-Revision: 45649

package/kernel/mt76/Makefile

@@ -33,8 +33,13 @@ NOSTDINC_FLAGS = \
 	-I$(STAGING_DIR)/usr/include/mac80211-backport \
 	-I$(STAGING_DIR)/usr/include/mac80211/uapi \
 	-I$(STAGING_DIR)/usr/include/mac80211 \
+	-include backport/autoconf.h \
 	-include backport/backport.h
 
+ifdef CONFIG_PACKAGE_MAC80211_MESH
+  NOSTDINC_FLAGS += -DCONFIG_MAC80211_MESH
+endif
+
 define Build/Compile
 	+$(MAKE) $(PKG_JOBS) -C "$(LINUX_DIR)" \
 		ARCH="$(LINUX_KARCH)" \