drm/msm/dsi-staging: avoid out of bounds access due to misplaced increment

Move increment counter post print statement to avoid
out of bounds access.

Change-Id: I844b0ddfcd09f3f92b9c9831a66a034ec1d03724
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>