MLK-15110-3 gpu: imx: Add i.MX8 DPR(Display Prefetch Resolve) support

MLK-15110-3 gpu: imx: Add i.MX8 DPR(Display Prefetch Resolve) support

The Display Prefetch Resolve(DPR) is a processor of fetching display data
before the display pipeline which needs data to drive pixels in the active
display region.  The data is transformed, or resolved from a variety of
tiled buffer formats into linear format.  The DPR transaction sequences are
issued with a high level of DRAM efficiency.  This patch adds the base
driver support for i.MX8qm/qxp DPR.

Signed-off-by: Liu Ying <victor.liu@nxp.com>