'Add remaining kernel_options to append_line'

def add_remaining_kopts(self, koptdict):

    append_line = ''
    for (k, v) in koptdict.iteritems():
        if (v is None):
            append_line += ('    %s' % k)
        elif isinstance(v, list):
            for i in v:
                append_line += ('    %s=%s' % (k, i))
        else:
            append_line += ('    %s=%s' % (k, v))
    append_line += '\n'
    return append_line
