arm64: dts: qcom: sc7180: Include gpio.h in edp bridge dts

The edp bridge dts fragment files use the macros defined in
'dt-bindings/gpio/gpio.h'.

To help us more flexibly order the #include lines of dts files in a
board-revision-specific dts file, let's include the gpio header in the
bridge dts fragment files themselves.
Signed-off-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211029152647.v3.1.Ie17e51ad3eb91d72826ce651ca2786534a360210@changeid

arch/arm64/boot/dts/qcom/sc7180-trogdor-parade-ps8640.dtsi

@@ -5,6 +5,8 @@
  * Copyright 2021 Google LLC.
  */
 
+#include <dt-bindings/gpio/gpio.h>
+
 / {
 	pp3300_brij_ps8640: pp3300-brij-ps8640 {
 		compatible = "regulator-fixed";

arch/arm64/boot/dts/qcom/sc7180-trogdor-ti-sn65dsi86.dtsi

@@ -5,6 +5,8 @@
  * Copyright 2021 Google LLC.
  */
 
+#include <dt-bindings/gpio/gpio.h>
+
 &dsi0_out {
 	remote-endpoint = <&sn65dsi86_in>;
 	data-lanes = <0 1 2 3>;