dt-bindings: arm: sti: drop B2120 board support
B2120 boards are internal boards which never were commercialised.
Remove them from bindings.
Signed-off-by: Raphael Gallais-Pou <rgallaispou@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
authored by