batman-adv: Simplify installation of files

It is not necessary to install each file manually to the target path. A
simple recursive copy is enough.

Signed-off-by: Sven Eckelmann <sven@narfation.org>

batman-adv/Makefile

@@ -86,12 +86,7 @@ define Build/Compile
 endef
 
 define KernelPackage/batman-adv/install
-	$(INSTALL_DIR) $(1)/etc/config $(1)/etc/hotplug.d/net $(1)/etc/hotplug.d/iface $(1)/lib/batman-adv $(1)/usr/sbin $(1)/lib/netifd/proto
-	$(INSTALL_DATA) ./files/etc/config/batman-adv $(1)/etc/config
-	$(INSTALL_DATA) ./files/lib/batman-adv/config.sh $(1)/lib/batman-adv
-	$(INSTALL_BIN) ./files/etc/hotplug.d/net/99-batman-adv $(1)/etc/hotplug.d/net
-	$(INSTALL_BIN) ./files/lib/netifd/proto/batadv.sh $(1)/lib/netifd/proto
-	$(INSTALL_BIN) ./files/lib/netifd/proto/batadv_vlan.sh $(1)/lib/netifd/proto
+	$(CP) ./files/. $(1)/
 endef
 
 $(eval $(call KernelPackage,batman-adv))