This adds support for the i.MX6 QUadPlus PRG unit. It glues together the IPU and the PRE units. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> --- v4: add missing ipu_soc->prg_priv