msm_fb: display: Wait for DMAE for external interface (DTV)
When calling FBIOPAN_DISPLAY for external, there is no wait
which results in irregular fps when tested with fbtest.
Enable DMAE wait to wait until DMAE is over thereby fixing
irregular fps shown in fbtest results.
Crs-fixed: 438078
Change-Id: Iff528ccc17a1e4078c8825b35d4778a7d9e40e7f
Signed-off-by:
Mayank Chopra <makchopra@codeaurora.org>
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