dts: bcm2712-rpi: The SoC gpiochips start at 10

Make the BCM2712's onboard GPIOs start at gpiochip10, marking them out
as system resources and preventing accidental use by existing Pi 5
code.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

Author: pelwell

arch/arm/boot/dts/broadcom/bcm2712-rpi.dtsi

@@ -107,6 +107,7 @@
 		gpio3 = &pinctrl;
 		gpio4 = &pinctrl_aon;
 		gpiochip0 = &gpio;
+		gpiochip10 = &gio;
 		i2c = &i2c_arm;
 		i2c0 = &i2c0;
 		i2c1 = &i2c1;