linux-imx

bus: fsl-mc: Allocate mc-portal from root dprc container

Root dprc container have allocate-able mc-portals which
can be allocated by kernel drivers.

As per current design mc-portal is allocated from parent
dprc container if requesting device is not root-dprc.
This works fine if the requesting device is child of
root dprc container, because their parent is root-dprc
container. But if request device is grandchild of root
dprc container then it tries to allocate from it's parent
root dprc-container and it fails.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>