arm64: dts: qcom: sdm630: Add disabled Venus support

Add support for the Venus video decoder/encoder but leave it disabled
by default; it is expected to eventually get enabled in each machine
specific DT, where required.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211008102119.268869-3-angelogioacchino.delregno@collabora.com