disable udev when systemd is selected as systemd included udev

target/config/Config.in.runtime

@@ -55,7 +55,7 @@ config ADK_RUNTIME_DEV_MDEV
 
 config ADK_RUNTIME_DEV_UDEV
 	bool "Use udev"
-	select ADK_PACKAGE_UDEV
+	select ADK_PACKAGE_UDEV if !ADK_PACKAGE_SYSTEMD
 	# needs depmod for module dependency generation on host
 	select ADK_HOST_BUILD_KMOD
 	select ADK_KERNEL_DEVTMPFS