dwc3: Use logging APIs to log events, errors and setup packet

dbg_event(), dbg_queue(), dbg_print() and dbg_setup() APIs are now
available which provides logging mechanism using IPC framework.
Hence add required debug logging to enhance runtime debugging.

Change-Id: I7757974f3d23c023cf38e901e3d0d70af96b62d5
Signed-off-by: Mayank Rana <mrana@codeaurora.org>