arm64: dts: qcom: sc7280-chrome-common: disable Venus

arm64: dts: qcom: sc7280-chrome-common: disable Venus

Iris driver doesn't support non-PAS/TZ setup for setting up the Iris
core. It's expected that the ABI that is going to be used in a long-term
would be different from the defined venus-firmware subnode.

Granted that the SC7280 Chromebooks were cancelled before reaching wide
audience and granted the feature ABI changes, drop venus configuration
for SC7280 ChromeOS devices.

Suggested-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Cc: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260131-venus-iris-flip-switch-v4-1-e10b886771e1@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>