cve-check: fix ValueError

cve-check: fix ValueError

fix below error for whitelisted recipe and recipe skip cve check.

Error:
The stack trace of python calls that resulted in this exception/failure was:
File: 'exec_python_func() autogenerated', lineno: 2, function: <module>
     0001:
 *** 0002:do_cve_check(d)
     0003:
File: '/poky-master/meta/classes/cve-check.bbclass', lineno: 59, function: do_cve_check
     0055:        try:
     0056:            patched_cves = get_patches_cves(d)
     0057:        except FileNotFoundError:
     0058:            bb.fatal("Failure in searching patches")
 *** 0059:        whitelisted, patched, unpatched = check_cves(d, patched_cves)
     0060:        if patched or unpatched:
     0061:            cve_data = get_cve_info(d, patched + unpatched)
     0062:            cve_write_data(d, patched, unpatched, whitelisted, cve_data)
     0063:    else:
Exception: ValueError: not enough values to unpack (expected 3, got 2)

Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>