This patch added support to boot from a component inside a container
from OsLoader. Now a boot option for SPI/memory device can be used
to boot from container component by specifying the boot image name
as '!AAAA/BBBB' format. AAAA is the container name and BBBB is
the component name. This component can be FV/TE/PE image format.
Signed-off-by: Maurice Ma <maurice.ma@intel.com>