Revert "Revert "msm: display: plane alpha support""

This reverts commit 27e40c7e12894efef6f5217a90f12170ec5c3546.
Revert "Revert "msm_fb: display: Add pseudo-planar 422 H1V2 support in the MDP4""

This reverts commit e48bbfbf8c72e66aa78177fab4ebf9cc7fa8ac04.
Revert "Revert "msm: rotator: Add pseudo-planar 422 H1V2 dst format for MDP4""

This reverts commit a0af1e3f539c4b3d6dd3678be58311d413ff1859.