ARM64: dts: marvell: armada-37xx: Fix the number of GPIO on south bridge

The number of pins in South Bridge is 30 and not 29. There is a fix for
the driver for the pinctrl, but a fix is also need at device tree level
for the GPIO.

Fixes: afda007f ("ARM64: dts: marvell: Add pinctrl nodes for Armada
3700")
Cc: <stable@vger.kernel.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -219,7 +219,7 @@ pinctrl_sb: pinctrl@18800 {
 				reg = <0x18800 0x100>, <0x18C00 0x20>;
 				gpiosb: gpio {
 					#gpio-cells = <2>;
-					gpio-ranges = <&pinctrl_sb 0 0 29>;
+					gpio-ranges = <&pinctrl_sb 0 0 30>;
 					gpio-controller;
 					interrupts =
 					<GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>,