arm64: dts: qcom: msm8994-octagon: Configure Lattice iCE40 FPGA

Octagon devices have a Lattice iCE40 FPGA connected over SPI.
Configure it.

Signed-off-by: Gustave Monce <gustave.monce@outlook.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210131013853.55810-13-konrad.dybcio@somainline.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>