N5X support both HPS handoff data and DDR handoff data.
Existing HPS handoff functions are restructured to support both existing
devices and N5X device.
Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>