Comment 15 for bug 2054556

On KR260,
```
ubuntu@kria:~$ apt-cache policy flash-kernel
flash-kernel:
  Installed: 3.104ubuntu20
  Candidate: 3.104ubuntu20
  Version table:
 *** 3.104ubuntu20 500
        500 http://ports.ubuntu.com/ubuntu-ports jammy-proposed/main arm64 Packages
        100 /var/lib/dpkg/status
     3.104ubuntu19 500
        500 http://ports.ubuntu.com/ubuntu-ports jammy-updates/main arm64 Packages
     3.104ubuntu17xlnx2 500
        500 http://oem.archive.canonical.com/updates jammy-limerick/public arm64 Packages
     3.104ubuntu9 500
        500 http://ports.ubuntu.com/ubuntu-ports jammy/main arm64 Packages

Preparing to unpack .../flash-kernel_3.104ubuntu20_arm64.deb ...^M
Unpacking flash-kernel (3.104ubuntu20) over (3.104ubuntu19) ...^M
Setting up flash-kernel (3.104ubuntu20) ...^M
Installing new version of config file /etc/flash-kernel/bootscript/bootscr.zynqmp ...^M
flash-kernel: deferring update (trigger activated)^M
Processing triggers for man-db (2.10.2-1) ...^M
Processing triggers for initramfs-tools (0.140ubuntu13.4) ...^M
update-initramfs: Generating /boot/initrd.img-5.15.0-1025-xilinx-zynqmp^M
flash-kernel: installing version 5.15.0-1025-xilinx-zynqmp^M
Couldn't find DTB on the following paths: /etc/flash-kernel/dtbs /usr/lib/linux-image-5.15.0-1025-xilinx-zynqmp /lib/firmware/5.15.0-1025-xilinx-zynqmp/device-tree/^M
Generating u-boot image... done.^M
Taking backup of image.fit.^M
Installing new image.fit.^M
Generating boot script u-boot image... done.^M
Taking backup of boot.scr.uimg.^M
Installing new boot.scr.uimg.^M
Processing triggers for flash-kernel (3.104ubuntu20) ...^M
flash-kernel: installing version 5.15.0-1025-xilinx-zynqmp^M
Couldn't find DTB on the following paths: /etc/flash-kernel/dtbs /usr/lib/linux-image-5.15.0-1025-xilinx-zynqmp /lib/firmware/5.15.0-1025-xilinx-zynqmp/device-tree/^M
Generating u-boot image... done.^M
Taking backup of image.fit.^M
Installing new image.fit.^M
Generating boot script u-boot image... done.^M
Taking backup of boot.scr.uimg.^M
Installing new boot.scr.uimg.^M

FRU Inventory From File: /sys/devices/platform/axi/ff030000.i2c/i2c-1/1-0050/eeprom

  FRU Board Manufacturing Date/Time: 10/07/21 - 17:38:00
  FRU Board Manufacturer: XILINX
  FRU Board Product Name: SMK-K26-XCL2G
  FRU Board Serial Number: 50571A119R10
```

The board reboots fine after the update