dt-bindings: display/msm: dsi-controller-main: Combine if:then: entries

dt-bindings: display/msm: dsi-controller-main: Combine if:then: entries

Several devices have the same clock inputs, thus they can be in the same
if:then: clause, making everything smaller.  No functional impact.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/638749/
Link: https://lore.kernel.org/r/20250221-b4-sm8750-display-v3-1-3ea95b1630ea@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>