DSS2: Rotation attrs for YUV need not to be reversed for 90 and 270

DSS2 supports horizontal mirroing. so only 180 and 0 degree attributes needs
to be reversed for mirroring.
Slight corrupt image is seen with 90 ad 270 degree rotation with mirroring
when the image height and widht is not 32-pixels aligned. To be specific
resolution is 168X192.

Signed-off-by: Hardik Shah <hardik.shah@ti.com>