msm_fb: display: clean pipe free or unlock calls

A few places have unnecessary mutex unlock calls, and iommu pipe free
depends on pipe parameters so move it before pipe is zeroed.

Change-Id: I7ef39c66be611907b1b0c38675b15f8bc919d0c0
Signed-off-by: Huaibin Yang <huaibiny@codeaurora.org>
2 files changed