arm64: dts: rockchip: rock5b: enable frame start/end debug gpios

Enable toggling GPIO for incoming camera frames for latency debugging.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

arch/arm64/boot/dts/rockchip/rk3588-rock-5b-imx415.dtsi

@@ -103,6 +103,9 @@ mipi2_csi2_output: endpoint@0 {
 };
 
 &rkcif {
+	/* pin 3 and 5 on the pin header */
+	frame-start-notify-gpios = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>; /* pin 3 on pin header */
+	frame-end-notify-gpios = <&gpio4 RK_PB2 GPIO_ACTIVE_HIGH>; /* pin 5 on pin header */
 	status = "okay";
 };