dt-bindings: arm: qcom: Document sdxkova platform and boards

Document the sdxkova platform binding and also the boards using it.

Change-Id: Ifc488cf86c0113ce4df6140770b328851a786235
Signed-off-by: Khaja Hussain Shaik Khaji <quic_kshaikkh@quicinc.com>

bindings/arm/qcom.yaml

@@ -61,6 +61,7 @@ description: |
         sdx55
         sdx65
         sdx75
+        sdxkova
         sm4250
         sm6115
         sm6125
@@ -744,6 +745,11 @@ properties:
               - qcom,sdx75-idp
           - const: qcom,sdx75
 
+      - items:
+          - enum:
+              - qcom,sdxkova-idp
+          - const: qcom,sdxkova
+
       - items:
           - enum:
               - qcom,ipq6018-cp01