usb: dwc3: trace: add trace logs for core and gadget
usb: dwc3: trace: add trace logs for core and gadget

Sometimes we want to just print a formatted
string without passing any extra data. The
following will be used for removing reliance
on dev_vdbg() from dwc3.

Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs