hostapd: add support for libnl-2.0

Index: b/package/hostapd/hostapd.mk
===================================================================
@@ -10,6 +10,10 @@
 HOSTAPD_CONFIG = $(HOSTAPD_DIR)/$(HOSTAPD_SUBDIR)/.config
 HOSTAPD_DEPENDENCIES = libnl
 
+define HOSTAPD_LIBNL_CONFIG
+	echo "CONFIG_LIBNL20=y" >>$(HOSTAPD_CONFIG)
+endef
+
 define HOSTAPD_CRYPTO_CONFIG
 	echo "CONFIG_CRYPTO=internal" >>$(HOSTAPD_CONFIG)
 	echo "CONFIG_INTERNAL_LIBTOMMATH=y" >>$(HOSTAPD_CONFIG)

@@ -82,6 +86,7 @@
 	$(HOSTAPD_RADIUS_IPV6_CONFIG)
 	$(HOSTAPD_EAP_CONFIG)
 	$(HOSTAPD_WPS_CONFIG)
+	$(HOSTAPD_LIBNL_CONFIG)
 endef
 
 define HOSTAPD_INSTALL_TARGET_CMDS