mediatek consys memory reserve

Required properties:
- compatible:Should be "mediatek,consys-reserve-memory".
- size: Should contain memory size need to be reserved.
- alignment: Memory address alignment

Examples:

		consys-reserve-memory {
			compatible = "mediatek,consys-reserve-memory";
			no-map;
			size = <0 0x200000>;
			alignment = <0 0x200000>;
		};