arm64: dts: qcom: sc7180: Drop duplicate dp_hot_plug_det node in trogdor

This moved from being trogdor specific to being part of the general
sc7180.dtsi SoC file in commit 681a607a ("arm64: dts: qcom:
sc7180: Add DisplayPort HPD pin dt node"). Then we dropped the pinconf
from the general sc7180.dtsi file in commit 8d079bf2 ("arm64: dts:
qcom: sc7180: Drop pinconf on dp_hot_plug_det") and added it back to
the trogdor dts file in commit f772081f ("arm64: dts: qcom:
sc7180: Add "dp_hot_plug_det" pinconf for trogdor").

As part of this we managed to forget to drop the old copy in the
trogdor dts. Let's do it now.
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
[dianders: updated desc]
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210311131008.1.I85fc8146c0ee47e261faa0c54dd621467b81952d@changeidSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi

@@ -1155,20 +1155,6 @@ pinconf {
 		};
 	};
 
-	dp_hot_plug_det: dp-hot-plug-det {
-		 pinmux {
-			 pins = "gpio117";
-			 function = "dp_hot";
-		 };
-
-		 config {
-			 pins = "gpio117";
-			 bias-disable;
-			 input-enable;
-			 drive-strength = <2>;
-		 };
-	 };
-
 	edp_brij_en: edp-brij-en {
 		pinmux {
 			pins = "gpio104";