arm64: dts: qcom: sdm630: Add compat qcom,sdm660-dsi-ctrl

The sdm630 can use the sdm660 mdss-dsi-ctrl compat. Currently it has the
same set of binding dependencies as sdm660.

Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221223021025.1646636-16-bryan.odonoghue@linaro.org