Verified_boot: Add header version 0 check

Add header version 0  check to avoid failure in loading
vendor_boot when boot image is not present in parititon.

Change-Id: Ie8384fca097b73cd96b08cc517f3ac54cc9258ae
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
1 file changed