dwc3: debug: Add logging APIs using IPC logging framework

This change creates separate debug buffer with each DWC instance and
provides debug API to log different important events using IPC logging
framework.

CRs-Fixed: 1040809
Change-Id: I9aee21a99f5bcd0e82e81092c05bc2238863f5e4
Signed-off-by: Mayank Rana <mrana@codeaurora.org>