tinker: Initial support (#140)

* tinker: initial support

* Fix info

* Fix uboot defconfig

* Split kernel config

* Fix name

* Add post-image

* Init different boot

* Add SPL images

* Dynamic rauc config

* Support SPL for OTA

* Fix expand script style

* Fix SPL

* Bump build u-boot

* Cleanup

* Add cmd for scritps

* Use kernel from armbian

* Fix u-boot

* Add bluetooth support

* Fix bt

* Fix env

* Change uart debug like rpi

* move config

buildroot-external/rootfs-overlay/usr/lib/rauc/install-spl

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+DEVICE_CHILD="$(findfs LABEL="hassos-boot")"
+DEVICE_ROOT="/dev/$(lsblk -no pkname ${DEVICE_CHILD})"
+IMAGE_FILE="${1}"
+
+# Check params
+if [ ! -f "${IMAGE_FILE}" ]; then
+    echo "[Error] Can't find image: ${IMAGE_FILE}"
+    exit 1
+fi
+
+dd if=${IMAGE_FILE} of=${DEVICE_ROOT} conv=notrunc bs=512 seek=2