arm64: dts: qcom: sm6125-xiaomi-ginkgo: Remove extcon

arm64: dts: qcom: sm6125-xiaomi-ginkgo: Remove extcon

GPIO pin 102 is related to DisplayPort what is not supported
by this device and it is also disabled at downstream,
remove the unnecessary extcon-usb node.

Fixes: 9b1a6c925c88 ("arm64: dts: qcom: sm6125: Initial support for xiaomi-ginkgo")
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Link: https://lore.kernel.org/r/20260126-xiaomi-willow-v3-4-aad7b106c311@mainlining.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>