projects/Amlogic: add device tree blobs to SD card image and update them during update process

projects/Amlogic/bootloader/mkimage

@@ -25,3 +25,7 @@ for src in $INSTALL_SRC_DIR/*autoscript.src ; do
     mcopy "$LE_TMP/$(basename $src .src)" ::
   fi
 done
+
+# copy device trees to part1
+mmd device_trees
+  mcopy $RELEASE_DIR/3rdparty/bootloader/*.dtb ::/device_trees

projects/Amlogic/bootloader/release

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+################################################################################
+#      This file is part of LibreELEC - https://libreelec.tv
+#      Copyright (C) 2018-present Team LibreELEC
+#
+#  LibreELEC is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  LibreELEC is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with LibreELEC.  If not, see <http://www.gnu.org/licenses/>.
+################################################################################
+
+. config/options $1
+
+mkdir -p $RELEASE_DIR/3rdparty/bootloader
+  cp -a $INSTALL/usr/share/bootloader/*.dtb $RELEASE_DIR/3rdparty/bootloader
+  cp $INSTALL/usr/share/bootloader/dtb.img $RELEASE_DIR/3rdparty/bootloader

projects/Amlogic/bootloader/update.sh

@@ -99,6 +99,12 @@ for arg in $(cat /proc/cmdline); do
   esac
 done
 
+if [ -d $BOOT_ROOT/device_trees ]; then
+  mount -o rw,remount $BOOT_ROOT
+  rm $BOOT_ROOT/device_trees/*.dtb
+  cp -p $SYSTEM_ROOT/usr/share/bootloader/*.dtb $BOOT_ROOT/device_trees/
+fi
+
 if [ -f $SYSTEM_ROOT/usr/share/bootloader/boot.ini ]; then
   echo "*** updating boot.ini ..."
   mount -o rw,remount $BOOT_ROOT