ARM: dts: qcom: apq8064: drop label property from DSI

DSI node does not accept nor use "label" property:

  qcom-apq8064-asus-nexus7-flo.dtb: dsi@4700000: Unevaluated properties are not allowed ('label' was unexpected)

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230924183335.49961-1-krzysztof.kozlowski@linaro.org


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