USB: mbim: Add super speed descriptors for MBIM function

This change adds super speed descriptors which is required to
get MBIM function to work with SSUSB mode. The burst
capability is not enabled for now.

CRs-Fixed: 626744
Change-Id: I2a492182c94265ab58014cac470448f61782625c
Signed-off-by: Mayank Rana <mrana@codeaurora.org>