For trusty bring-up, key_info is needed.
Currently, bootloader did not transfer key_info to hypervisor.
So in this patch, use dummy key_info temporarily.
Derive vSeed from dSeed before trusty startup, the vSeed will
bind with UUID of each VM.
Remove key_info from sworld_control structure.
Signed-off-by: Qi Yadong <yadong.qi@intel.com>