dt-bindings: arm: qcom: add oneplus3(t) devices

Add compatible strings for the OnePlus 3 and 3T phones which utilise the
Qualcomm MSM8996 SoC.
Signed-off-by: Harry Austen <hpausten@protonmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221023204505.115141-4-hpausten@protonmail.com

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -223,6 +223,8 @@ properties:
 
       - items:
           - enum:
+              - oneplus,oneplus3
+              - oneplus,oneplus3t
               - qcom,msm8996-mtp
               - sony,dora-row
               - sony,kagura-row