usb: dwc3: Remove DEBUG define from Qualcomm DWC3 glue driver

It appears that a "#define DEBUG" was left in on the recent patch
landed for the Qualcomm DWC3 glue driver.  Let's remove it.

Fixes: a4333c3a

 ("usb: dwc3: Add Qualcomm DWC3 glue driver")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>