ARM: dts: axp209: Rename usb_power_supply node to avoid warnings

The USB power supply node in the AXP209 DTSI is using underscores in its
node name, which is generating a warning. Change those underscores for
hyphens.
Acked-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/axp209.dtsi

@@ -107,7 +107,7 @@
 		};
 	};
 
-	usb_power_supply: usb_power_supply {
+	usb_power_supply: usb-power-supply {
 		compatible = "x-powers,axp202-usb-power-supply";
 		status = "disabled";
 	};