MLK-19017-5 drm/imx: add DISPMIX power domain support for SEC DSIM

MLK-19017-5 drm/imx: add DISPMIX power domain support for SEC DSIM

After the DISPMIX power domain enabled, all the related registers
will drop their values once runtime pm suspend called. So in the
pm runtime resume process, the SEC DSIM de-reset and some init jobs
need to be done, and these jobs are no longer necessary to be done
during probe bind anymore.

Signed-off-by: Fancy Fang <chen.fang@nxp.com>
(cherry picked from commit 7a7f17f5fb66135629ef20a2b4780dfef2f0f0ce)
(cherry picked from commit 1f80017f237264f2c84579d8291de210b0ac746c)