[FIX] point_of_sale: Improve IoT wifi firmware

Use the last version of raspberry pi os to build the IoT Box
We don't hold anymore the firmware-brcm80211

closes odoo/odoo#70037

X-original-commit: a8c952fe477d22f5a88696df44e63faca13cba06
Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>

addons/point_of_sale/tools/posbox/overwrite_before_init/etc/init_posbox_image.sh

@@ -20,8 +20,6 @@ echo "export LC_ALL=en_US.UTF-8" >> ~/.bashrc
 locale-gen
 source ~/.bashrc
 
-# upgrade firmware-brcm80211 broke access point on rpi4
-apt-mark hold firmware-brcm80211
 apt-get update && apt-get -y upgrade
 # Do not be too fast to upgrade to more recent firmware and kernel than 4.38
 # Firmware 4.44 seems to prevent the LED mechanism from working

addons/point_of_sale/tools/posbox/posbox_create_image.sh

@@ -29,15 +29,15 @@ MOUNT_POINT="${__dir}/root_mount"
 OVERWRITE_FILES_BEFORE_INIT_DIR="${__dir}/overwrite_before_init"
 OVERWRITE_FILES_AFTER_INIT_DIR="${__dir}/overwrite_after_init"
 VERSION=14.0
-VERSION_IOTBOX=21.03
+VERSION_IOTBOX=21.04
 REPO=https://github.com/odoo/odoo.git
 
 if ! file_exists *raspios*.img ; then
-    wget 'http://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2020-02-07/2020-02-05-raspbian-buster-lite.zip' -O raspios.img.zip
+    wget 'http://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2021-03-25/2021-03-04-raspios-buster-armhf-lite.zip' -O raspios.img.zip
     unzip raspios.img.zip
 fi
 
-RASPIOS=$(echo *raspbian*.img)
+RASPIOS=$(echo *raspios*.img)
 rsync -avh --progress "${RASPIOS}" iotbox.img
 
 CLONE_DIR="${OVERWRITE_FILES_BEFORE_INIT_DIR}/home/pi/odoo"