msm: mdss: rotator: deinterlace layer prior to rotation

Make use of the MDP_ROTATION_DEINTERLACE flag. By using the deinterlaced
flag we are able to properly read in the source layer for rotation.

Change-Id: Ia4198f228188975cfc6b57acecedb153c7234aa4
Signed-off-by: Terence Hampson <thampson@codeaurora.org>