arm64: dts: qcom: sc7280: Add venus DT node

Add DT entries for the sc7280 venus encoder/decoder.

Co-developed-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1635259922-25378-1-git-send-email-quic_dikshita@quicinc.com