msm: mdss: Modify SMP requirement for BWC decompression

BWC SMP buffer allocations are different from BWC fetch strides.
The Detile write of BWC is segmented into 16 algined segments for
every line buffer. This has to be taken into account and based on the
format the buffers need to be channeled.

Change-Id: I168014709bd81bfb189ce8cb3d1224f911838ba7
Signed-off-by: Sree Sesha Aravind Vadrevu <svadrevu@codeaurora.org>