arm64: dts: qcom: x1e001de-devkit: Drop clock-names from PS8830

The preemptively-merged node contains a property absent from the final
bindings. Remove it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Fixes: 019e1ee3 ("arm64: dts: qcom: x1e001de-devkit: Enable external DP support")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20250306-topic-dt_bindings_fixups-v1-11-0c84aceb0ef9@oss.qualcomm.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>