boards: bbc: adopt new zephyr:board directive and role

This updates the documentation of all the BBC boards to use
the new `zephyr:board::` directive.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

boards/bbc/microbit/doc/index.rst

@@ -1,7 +1,4 @@
-.. _bbc_microbit:
-
-BBC MicroBit
-##############
+.. zephyr:board:: bbc_microbit
 
 Overview
 ********
@@ -23,12 +20,6 @@ connectors that are part of the 23-pin edge connector.
 * FLASH
 * RADIO (Bluetooth Low Energy)
 
-.. figure:: img/bbc_microbit.jpg
-     :align: center
-     :alt: BBC Micro Bit
-
-     BBC Micro Bit (Credit: http://microbit.org/)
-
 More information about the board can be found at the `microbit website`_.
 
 Hardware

boards/bbc/microbit_v2/doc/index.rst

@@ -1,7 +1,4 @@
-.. _bbc_microbit_v2:
-
-BBC MicroBit V2
-#################
+.. zephyr:board:: bbc_microbit_v2
 
 Overview
 ********
@@ -16,12 +13,6 @@ magnetometer sensors, Bluetooth and USB connectivity, a display consisting of
 USB or an external battery pack. The device inputs and outputs are through five
 ring connectors that are part of the 23-pin edge connector.
 
-.. figure:: img/bbc_microbit2.jpg
-     :align: center
-     :alt: BBC Micro Bit V2
-
-     BBC Micro Bit V2 (Credit: http://microbit.org/)
-
 More information about the board can be found at the `microbit website`_.
 
 Hardware

samples/basic/servo_motor/README.rst

@@ -52,7 +52,7 @@ ground and the white wire to the SCL pin, i.e. pin P19 on the edge connector.
 Building and Running
 ********************
 
-The sample has a devicetree overlay for the :ref:`bbc_microbit`.
+The sample has a devicetree overlay for the :zephyr:board:`bbc_microbit`.
 
 This sample can be built for multiple boards, in this example we will build it
 for the bbc_microbit board:

samples/boards/nordic/nrf_led_matrix/README.rst

@@ -8,7 +8,7 @@ Overview
 
 This is a simple application intended to present the nRF LED matrix display
 driver in action and to serve as a test ensuring that this driver is buildable
-for both the :ref:`bbc_microbit_v2` and :ref:`bbc_microbit` boards.
+for both the :zephyr:board:`bbc_microbit_v2` and :zephyr:board:`bbc_microbit` boards.
 
 Requirements
 ************

samples/sensor/fxos8700/README.rst

@@ -18,7 +18,7 @@ This project outputs sensor data to the console. FXOS8700
 sensor is present on the :ref:`frdm_k64f`, :ref:`frdm_k22f`,
 :ref:`frdm_kw41z`, :ref:`hexiwear`, and :ref:`twr_ke18f` boards.
 Accelerometer only devices are present on the :ref:`frdm_kl25z`,
-:ref:`bbc_microbit`, and :ref:`reel_board` boards. It does not work on
+:zephyr:board:`bbc_microbit`, and :ref:`reel_board` boards. It does not work on
 QEMU.
 
 Building and Running for FRDM-K64F