dt-bindings: arm: qcom: Add sdm630 and sdm660 SoCs

Add a SoC strings for the Qualcomm SDM630 and SDM660 SoCs.
Also document the new xiaomi,lavender compatible used in
a device tree binding.

Signed-off-by: Alexey Minnekhanov <alexey.min@gmail.com>
Link: https://lore.kernel.org/r/20200417012630.222352-2-alexey.min@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -37,6 +37,8 @@ description: |
         msm8994
         msm8996
         sc7180
+        sdm630
+        sdm660
         sdm845
 
   The 'board' element must be one of the following strings:
@@ -153,6 +155,11 @@ properties:
               - qcom,sc7180-idp
           - const: qcom,sc7180
 
+      - items:
+          - enum:
+              - xiaomi,lavender
+          - const: qcom,sdm660
+
       - items:
           - enum:
               - qcom,ipq6018-cp01-c1