usb: core: Kconfig: Improve USB authorization mode help

	  Select the default USB device authorization mode. Can be overridden

	  with usbcore.authorized_default command line or module parameter.

	  The available values have the following meanings:

		0 is unauthorized for all devices

		1 is authorized for all devices (default)

		2 is authorized for internal devices

	  This option allows you to choose whether USB devices that are

	  connected to the system can be used by default, or if they are

	  locked down.

	  If the default value is too permissive but you are unsure which mode

	  to use, say 2.

	  With value 0 all connected USB devices with the exception of root

	  hub require user space authorization before they can be used.

	  With value 1 (default) no user space authorization is required to

	  use connected USB devices.

	  With value 2 all connected USB devices with exception of internal

	  USB devices require user space authorization before they can be

	  used. Note that in this mode the differentiation between internal

	  and external USB devices relies on ACPI, and on systems without

	  ACPI selecting value 2 is analogous to selecting value 0.

	  If unsure, keep the default value.