spl: fit: Fix entry point for SPL_LOAD_FIT_FULL

The entry point is not always the same as the load address. Use the value
of the entry property if it exists.

Fixes: 8a9dc16e4d0 ("spl: Add full fitImage support")
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed