msm_fb: display: balance secure map and unmap in each mfd

Make sure secure map and unmap get called in each mfd and balanced.
Otherwise, secure contents can not be played for both primary and
hdmi.

CRs-fixed: 450427
Change-Id: I5399be64fbb104dc3cbe2c5c65b3f4406f47473c
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>

Conflicts:

	drivers/video/msm/msm_fb.h

Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
Merge "msm_fb: display: balance secure map and unmap in each mfd"