arch: arm64: boot: dts: restructure MC

arch: arm64: boot: dts: restructure MC

Device tree modifications to restructure
Media controller framework.
Remove CSI as subdevice.
Remove dummy video nodes being created.

Bug 1617777

Change-Id: Ic9dc1c3b17ad290232e88b68d056161b47f2e16c
Signed-off-by: Bhanu Murthy V <bmurthyv@nvidia.com>
Reviewed-on: http://git-master/r/922111
(cherry picked from commit e86810667ceb3857f46fe3f2d36809090980bb6e)
Reviewed-on: http://git-master/r/925628
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>