arm64: dts: qcom: sm8250: Add venus DT node

Add DT entries for the sm8250 venus encoder/decoder.

Co-developed-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Co-developed-by: Dikshita Agarwal <dikshita@qti.qualcomm.com>
Signed-off-by: Dikshita Agarwal <dikshita@qti.qualcomm.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210401174256.1810044-3-bryan.odonoghue@linaro.org


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