firmware-qcom-rb5: install rb5-specific board data
firmware-qcom-rb5: install rb5-specific board data

linux-firmware-ath11k provides QCA6390 hw2.0 firmware, but the board
data file does not provide board data for RB5. So provide fallback
board.bin file for the driver.

Signed-off-by: Dmitry Baryshkov <2dcd7ecf02101ef1dca344c0511f3ffb180907c2@linaro.org>

ndechesne/meta-qcom,ndechesne/meta-qcom,ndechesne/meta-qcom