Add ospi boot media support to load splash image from OSPI memory,
add offset to read image from ospi and necessary flags defininig type
of storage and storage device.
Use CONFIG_IS_ENBALED to use the splash locations at SPL and u-boot
proper.
Signed-off-by: Nikhil M Jain <n-jain1@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Devarsh Thakkar <devarsht@ti.com>