dt-bindings: arm: qcom: Document Eliza SoC and its MTP board

Qualcomm Eliza SoC comes with different flavors. There is SM7750 for
mobiles and then QC7790S/M for IoT. One of the boards that comes with
Eliza SoC is the MTP.

So document both the SoC and MTP board compatibles.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260318-eliza-base-dt-v3-1-8a50bd2201ed@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -61,6 +61,11 @@ properties:
               - qcom,apq8084-sbc
           - const: qcom,apq8084
 
+      - items:
+          - enum:
+              - qcom,eliza-mtp
+          - const: qcom,eliza
+
       - items:
           - enum:
               - qcom,glymur-crd