arm64: dts: qcom: x1e001de-devkit: Enable external DP support

The Qualcomm Snapdragon X Elite Devkit for Windows has the same
configuration as the CRD variant i.e. all 3 of the type C ports
support external DP altmode. Add all the nodes needed to enable
them.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Link: https://lore.kernel.org/r/20241025123551.3528206-4-quic_sibis@quicinc.com


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