usb: linux/usb.h: Correct the description of the usb_device_driver member

In the current kernel USB device driver code, only the name field is
required to be provided; all other fields are optional.

Correct this part of the description.

Signed-off-by: Yi Cong <yicong@kylinos.cn>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://patch.msgid.link/20251202090948.334809-1-cong.yi@linux.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed