applications: Migrate to the new board variant

Use nRF52840 dongle board variant for applications that overwrite nRF5
SDK bootloader.

Ref: NCSDK-NONE

Signed-off-by: Tomasz Chyrowicz <[email protected]>

Author: tomchy

applications/nrf_desktop/board_configuration.rst

@@ -87,12 +87,12 @@ nRF52832 Desktop Keyboard (``nrf52kbd``)
       * The board supports ``release`` :ref:`nrf_desktop_bluetooth_guide_fast_pair` configuration (``release_fast_pair`` file suffix).
         The configuration uses the MCUboot bootloader built in the direct-xip mode (``MCUBOOT+XIP``), and supports firmware updates using the :ref:`nrf_desktop_dfu` and the :ref:`nrf_desktop_dfu_mcumgr`.
 
-nRF52840 USB Dongle (``nrf52840dongle/nrf52840``) and nRF52833 USB Dongle (``nrf52833dongle``)
+nRF52840 USB Dongle (``nrf52840dongle/nrf52840/bare``) and nRF52833 USB Dongle (``nrf52833dongle``)
       * Since the nRF52840 Dongle is generic and defined in Zephyr, project-specific changes are applied in the DTS overlay file.
       * The application is configured to act as a dongle that forwards data from both mouse and keyboard.
       * Bluetooth uses Nordic Semiconductor's SoftDevice link layer and is configured to act as a central.
         Input data comes from Bluetooth and is retransmitted to USB.
-      * The configuration with the B0 bootloader is set as default for the ``nrf52840dongle/nrf52840`` board and with the MCUboot bootloader is set as default for the ``nrf52833dongle`` board.
+      * The configuration with the B0 bootloader is set as default for the ``nrf52840dongle/nrf52840/bare`` board and with the MCUboot bootloader is set as default for the ``nrf52833dongle`` board.
 
 nRF52820 USB Dongle (``nrf52820dongle``)
       * The application is configured to act as a dongle that forwards data from both mouse and keyboard.