parse_ucode() is abnormal compared to similar parsing elsewhere in Xen.
Invert the ucode_mod_forced check with respect to the "scan" and integer
handling, so we can warn the user when we've elected to ignore the parameters,
and yield -EINVAL for any unrecognised list element.
Rewrite the ucode= command line docs for clarity.
No practical change.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>