added rpi 4 configuration

corrected bug in addmedia for cauldron
need updating u-boot package

platforms/rpi4/mageia4arm.cfg.original

@@ -0,0 +1,56 @@
+
+# Copyright (C) 2017-2018 Daniel Tartavel-jeannot   <dtux@free.fr>
+#
+# This program 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.
+#
+# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+MAGEIA_VERSION="7"
+ARM_VERSION="armv7hl"
+
+#target plateform (xu3-4 or rpi)
+TARGET="rpi" 
+
+# URL of the Mageia mirror used to install ( see mirrors.mageia.org )
+MIRROR="http://ftp.free.fr/mirrors/mageia.org/distrib/$MAGEIA_VERSION/$ARM_VERSION"
+# image will be created here
+INSTALL_PATH="<change this>"
+
+# Build directory will be created here
+BUILD_PATH="$INSTALL_PATH/build"
+
+#name of the image
+IMAGE="Mageia-${MAGEIA_VERSION}-$TARGET.img"
+
+#Mount point of image's partitions
+#no need to be changed
+BOOT="/mnt/boot"
+ROOT="/mnt/root"
+
+#Default user
+ID_USER="pi"
+PASSWORD="raspberry"
+
+#root password
+ROOT_PWD="piroot"
+
+#Hostname 
+HOSTNAME="$TARGET.$ID_USER" 
+
+#Filesystem of boot partitions (default ext4 raspberry pi need vfat)
+#DO NOT CHANGE THIS
+BOOTFS="vfat"
+
+#Path where the raspberry pi firmware is/will be downloaded
+FIRMWARE_PATH="$INSTALL_PATH"
+FIRMWARE_DIR="firmware-stable"