linux-phytec-ti

usb: gadget: legacy: multi: set max speed to super-speed

multi uses ACM, ECM/RNDIS and mass storage interfaces, all
of which support super-speed. Let's not limit g_multi
to high-speed.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>