MLK-18036-1 Add "fsl,optee-lpm-sram" node for optee os power management.

MLK-18036-1 Add "fsl,optee-lpm-sram" node for optee os power management.

This node will be used by the OCRAM driver in optee to:
* Get the OCRAM start address for power management in optee.
* Add an entry that will overwrite ocrams nodes and dynamically reduce
the OCRAM available for mmio-sram in Linux.

That way we do not touch the legacy Linux boot and remove the dedicated
optee device tree.

Signed-off-by: Clement Faure <clement.faure@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit e96a3bcd754dee0aef3519bc08979985493be52c)