arm64: dts: qcom: qrb4210-rb2: Enable GPU

Enable the A610 GPU and provide a firmware path to the ZAP blob.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230620-topic-gpu_tablet_disp-v2-4-0538ea1beb0b@linaro.org


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