Robert Chiras authored Aug 21, 2019 and Guido Gunther committed Oct 18, 2019

Besides the eLCDIF block, there is another IP block, used in the past
for EPDC panels. Since the iMX.8mq doesn't have an EPDC connector, this
block is not documented, but we can use it to do additional operations
on the frame buffer.
In this case, we can use the pigeon registers from this IP block in
order to do horizontal crop on the frame buffer processed by the eLCDIF
block.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>