ram: k3-ddrss: Add support for a partial inline ECC region

ram: k3-ddrss: Add support for a partial inline ECC region

Instead of defaulting to choosing the entire DDR region when enabling
inline ECC, allow picking of a range within the DDR space using DT to
enable.

It expects such a node within the memory node, in the absence of which
we resort to enabling inline ECC for the entire DDR region:

inline_ecc: protected@9e780000 {
        device_type = "ecc";
        reg = <0x9e780000 0x0080000>;
        bootph-all;
};

Signed-off-by: Neha Malcom Francis <n-francis@ti.com>