Freescale reserved memory regions

iMX reserved memory pool, being merged into cma region

Required properties
- compatible: "imx-ion-pool"

Required properties:
 - reg: (standard definition) static memory range


Example:
  vpu_region: imx_ion@2 {
    compatible = "imx-ion-pool";
    reg = <0x0 0xe4000000 0 0x02000000>;
  };