Use extension for Lima X.Org serverflags

* Remove create_desktop_package.sh for rk3318 board from
   config/optional, clearing the whole directory tree
 * Add an extension to implement serverflags workaround
   for X.Org and Lima driver not being autodetected
 * Fix rk3318-box and rk322x family to use extension in place
   of 40-serverflags.conf bsp file

extensions/xorg-lima-serverflags.sh

@@ -0,0 +1,34 @@
+#
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2023 Armbian 
+# This file is a part of the Armbian Build Framework https://github.com/armbian/build/
+#
+
+# Install 40-serverflags.conf in xorg.conf.d directory because autodetection
+# may be faulty on some x.org revisions.
+function post_family_tweaks_bsp__install_lima_serverflags() {
+
+	display_alert "${EXTENSION} ${BOARD}" "adding lima x.org serverflags workaround to BSP" "info"
+
+	declare xorg_conf_dir="/etc/X11/xorg.conf.d"
+	declare conf_lima_file="40-serverflags.conf"
+	run_host_command_logged mkdir -pv "${destination}${xorg_conf_dir}"
+
+	cat <<- LIMA_SERVERFLAGS > "${destination}${xorg_conf_dir}/${conf_lima_file}"
+		Section "ServerFlags"
+			Option  "AutoAddGPU" "off"
+			Option "Debug" "dmabuf_capable"
+		EndSection
+
+		Section "OutputClass"
+			Identifier "Lima"
+			Driver "modesetting"
+			MatchDriver "rockchip"
+			Option "AccelMethod" "glamor"
+			Option "PrimaryGPU" "true"
+		EndSection
+	LIMA_SERVERFLAGS
+
+	return 0
+}
+