gpu: ipu-v3: Add Image Converter unit

Adds the Image Converter (IC) unit.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Condensed the three CSC setup functions into a single one that
uses static tables to set up the CSC task parameters.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --cc drivers/gpu/ipu-v3/Makefile
Simple merge

diff --cc drivers/gpu/ipu-v3/ipu-common.c
Simple merge

diff --cc drivers/gpu/ipu-v3/ipu-ic.c
Simple merge

diff --cc drivers/gpu/ipu-v3/ipu-prv.h
Simple merge

diff --cc include/video/imx-ipu-v3.h
Simple merge