usb: gadget: composite: Fix USB version number for L1

When usb version number is greater than 2.01 USB-CV expects to find a
Super Speed USB Device Capability descriptor. When we want to enable BOS
descriptor capabilities for a high-speed device the USB version number
should be 2.01.

CRs-Fixed: 521752
Change-Id: Ic75b5e570b3c2df8e67370389dfddc8de6fb72d4
Signed-off-by: Shimrit Malichi <smalichi@codeaurora.org>