It is a pain to have to specify the value 16 in each call. Add a new
hextoul() function and update the code to use it.
Add a proper comment to simple_strtoul() while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
Support 'vab' command to perform vendor authentication.
Command format: vab addr len
Authorize 'len' bytes starting at 'addr' via vendor public key
Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>