msm: mdss: update watermark level programming for macrotile formats

Fetch and store logic for macrotile format is different than linear
format. Update watermark level programming to accommodate these
differences.

Change-Id: Id0810bd1e56f9fca00de94f933c9e2db6dead83c
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>