vabtool: Fix the format of the usage message
Recent additions to the vabtool and the usage message left the usage
message in a bad state (a missing end-brace at the end of the parameter
list).  This change replaces the final comma with "} ..."
@@ -292,7 +292,7 @@ help() {
printf "Usage: vabtool {sr_key_provision, sr_status,\n"
printf " pr_key_provision, pr_status,\n"
printf " sr_key_cancel, sr_cancel_status,\n"
- printf " pr_key_cancel, pr_cancel_status,\n"
+ printf " pr_key_cancel, pr_cancel_status} ...\n"
printf "\n"
printf "\tPerform Vendor Authorized Boot flows for Intel Acceleration Development Platform\n"
printf "\n"
