extensions: rk-panthor: mesa-oibaf + DEFAULT_OVERLAYS="panthor-gpu"

- I had worked this before AF sent his oneliner, but I forgot to PR
- Should be the same, except avoids sadness when trying with the wrong kernel/branch

extensions/rk-panthor.sh

@@ -1 +1,26 @@
-declare -g DEFAULT_OVERLAYS=panthor-gpu
+#
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2024 Ricardo Pardini <ricardo@pardini.net>
+# This file is a part of the Armbian Build Framework https://github.com/armbian/build/
+#
+
+# Enables panthor-gpu overlay and oibaf-mesa extension. Only meant for legacy/vendor branches of Rockchip boards.
+enable_extension "mesa-oibaf" # Enable OIBAF repo for mainline mesa
+
+function extension_prepare_config__rk_panthor() {
+	display_alert "Preparing rk-panthor" "${EXTENSION}" "info"
+	EXTRA_IMAGE_SUFFIXES+=("-panthor") # Add to the image suffix. # global array
+
+	# Enable panthor overlay by default
+	declare -g DEFAULT_OVERLAYS="panthor-gpu"
+
+	[[ "${BUILDING_IMAGE}" != "yes" ]] && return 0
+
+	if [[ "${LINUXFAMILY}" != "rockchip-rk3588" && "${LINUXFAMILY}" != "rk35xx" ]]; then
+		exit_with_error "${EXTENSION} only works on LINUXFAMILY=rockchip-rk3588/rk35xx, currently on '${LINUXFAMILY}'"
+	fi
+
+	if [[ "${BRANCH}" != "vendor" ]]; then
+		exit_with_error "${EXTENSION} only works on BRANCH=vendor, currently on '${BRANCH}'"
+	fi
+}