usb: misc code formatting
usb: misc code formatting

SPICE/spice-gtk,flexVDI/spice-gtk,fgouget/spice-gtk,Fantu/spice-gtk,flexVDI/spice-gtk,SPICE/spice-gtk,Fantu/spice-gtk,Fantu/spice-gtk,fgouget/spice-gtk,SPICE/spice-gtk,Fantu/spice-gtk,fgouget/spice-gtk,SPICE/spice-gtk