boards: bbc_microbit*: Add led_matrix devicetree node

Both BBC micro:bit v1 and v2 boards are equipped with a LED matrix
driven by the SoC GPIOs. Add "nordic,nrf-led-matrix" compatible nodes
to DTS files of both these boards so that the nRF LED matrix display
driver can be used for them.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
2 files changed