arm64: dts: qcom: sc7180: Drop pinconf on dp_hot_plug_det

We shouldn't put any pinconf here in case someone decides to invert this
HPD signal or remove an external pull-down. It's better to leave that to
the board pinconf nodes, so drop it here.
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reported-by: Douglas Anderson <dianders@chromium.org>
Cc: Tanmay Shah <tanmay@codeaurora.org>
Fixes: 681a607a ("arm64: dts: qcom: sc7180: Add DisplayPort HPD pin dt node")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20201215020004.731239-1-swboyd@chromium.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

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

@@ -1468,12 +1468,6 @@ pinmux {
 					pins = "gpio117";
 					function = "dp_hot";
 				};
-
-				pinconf {
-					pins = "gpio117";
-					bias-disable;
-					input-enable;
-				};
 			};
 
 			qspi_clk: qspi-clk {