To make compositive usb device string more reansonable, not all devices
just show same "RTT Composite Device" on windows device manager.
add a interface rt_usbd_device_set_interface_string to set respective
interface string.
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
v1 -> v2: remove all tabs to space, to match rt-thread coding style
1. delete '#include <rtservice.h>', because rtthread.h had include rtservice.h;
2. delete '#include <rtthread.h>', because rtdevice.h had include rtthread.h.
guozhanxin
dillon-min
Dillon Min
Meco Man
David Lin