dt-bindings: display/msm: dp-controller: Allow DAI on SM8650 and others

dt-bindings: display/msm: dp-controller: Allow DAI on SM8650 and others

DisplayPort on Qualcomm SoCs like SM8650 and compatible SM8750 supports
audio and there is already DTS having cells and sound-name-prefix.  The
"else:" clause for non-EDP and non-aux-bus cases already requires
'#sound-dai-cells', so it should actually reference the dai-common.yaml
for other properties, as pointed out by dtbs_check warnings like:

  sm8650-hdk-display-card-rear-camera-card.dtb:
    displayport-controller@af54000 (qcom,sm8650-dp): Unevaluated properties are not allowed ('sound-name-prefix' was unexpected)

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/716452/
Link: https://lore.kernel.org/r/20260405-dts-qcom-display-regs-v2-2-34f4024c65dc@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>