usb: gadget: qdss: Use usb_ep_autoconfig() instead of ss() variant

usb_ep_autoconfig_ss() is only needed in case a function wants
to match on both an EP descriptor as well as a SS companion
that specifies the number of streams. Since the QDSS function
doesn't use streams, we can simply use the normal
usb_ep_autoconfig() function instead to simplify the code.

This also allows building usb_f_qdss as a module against a GKI
kernel which doesn't currently have the usb_ep_autoconfig_ss()
symbol exported from the KMI.

Change-Id: Iab1caff332b7a9d708286a2d67ae2ee6bf490f34
Signed-off-by: Jack Pham <jackp@codeaurora.org>