arm64: dts: qcom: sm8250: camss: Add CAMSS block definition

Adds a CAMSS definition block.

Co-developed-by: Julian Grahsl <jgrahsl@snap.com>
Signed-off-by: Julian Grahsl <jgrahsl@snap.com>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220415164655.1679628-3-bryan.odonoghue@linaro.org