arm64: dts: qcom: x1e80100-romulus: Enable DP over Type-C

Both ports seem to work, just like on other X1E laptops.

Tested with a Type-C-to-HDMI2.0 dock (translating into up to 2 DP lanes
worth of bandwidth).

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250514-topic-romu_dp-v1-1-6242d6acb5e5@oss.qualcomm.com


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