msm: mdss: Enforce interlaced format w,h alignment

Interlaced formats need to be aligned to multiples of 4 to mainitain
evenness as hardware expects an even source rectangle. Moreover
interlace only works on half of the source rectangle.

Change-Id: I0eb920be87a9b76c6da18fd19566eb5dd090d737
Signed-off-by: Sree Sesha Aravind Vadrevu <svadrevu@codeaurora.org>