[DEBUG] arm64: dts: rockchip: rock5bp: enable vsync debug gpio

Enable vsync GPIOs for the second camera/display.
On a Rock 5B+ this means:

Pin  1 = 3.3V
Pin  3 = ISP0 frame start
Pin  5 = ISP0 frame end
Pin  7 = VP0 vsync
Pin  9 = GND
Pin 11 = ISP1 frame start
Pin 13 = ISP1 frame end
Pin 15 = VP1 vsync

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

arch/arm64/boot/dts/rockchip/rk3588-rock-5b-imx415-port2.dtsi

@@ -106,6 +106,9 @@ mipi4_csi2_output: endpoint@0 {
 };
 
 &rkcif {
+	/* pin 11 and 13 on the pin header */
+	isp1-frame-start-notify-gpios = <&gpio3 RK_PC1 GPIO_ACTIVE_HIGH>; /* pin 11 on pin header */
+	isp1-frame-end-notify-gpios = <&gpio3 RK_PB7 GPIO_ACTIVE_HIGH>; /* pin 13 on pin header */
 	status = "okay";
 };
 
@@ -154,3 +157,7 @@ isp1_vir1: endpoint@0 {
 		};
 	};
 };
+
+&vp1 {
+	vsync-notify-gpios = <&gpio3 RK_PC0 GPIO_ACTIVE_HIGH>; /* pin 15 on pin header */
+};