MAINTAINERS: Add Apple dwc3 bindings to ARM/APPLE

This Apple dwc3 controller variance is present on Apple ARM SoCs (t8103/t600x).

Splitting this change from the binding/driver commits to avoid merge
conflicts with other things touching this section, as usual.

Signed-off-by: Hector Martin <marcan@marcan.st>

Author: marcan

MAINTAINERS

@@ -2159,6 +2159,7 @@ F:	Documentation/devicetree/bindings/pci/apple,pcie.yaml
 F:	Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
 F:	Documentation/devicetree/bindings/power/apple*
 F:	Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml
+F:	Documentation/devicetree/bindings/usb/apple,dwc3.yaml
 F:	Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
 F:	arch/arm64/boot/dts/apple/
 F:	drivers/bluetooth/hci_bcm4377.c