msm: mdss: add arb/xin client and test point info in vbif dbg log

Include arb/xin client information and test point
information in vbif debug bus log for easy parsing.

Change-Id: I366819e98ec9b9815d5cc88587c914bdebf7b4f4
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>