usb: dwc3: remove reliance on dev_vdbg()

By moving all dev_vdbg() to tracepoints, we
can finally get rid of dev_vdbg() usage from
dwc3.

Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --cc drivers/usb/dwc3/Kconfig
Simple merge

diff --cc drivers/usb/dwc3/Makefile
Simple merge

diff --cc drivers/usb/dwc3/core.c
Simple merge

diff --cc drivers/usb/dwc3/gadget.c
Simple merge