ALLEN PARK, Mich. — Christmas can come early. It has before for the Lions, and the hope — the plan, actually — is for it to happen again this weekend, as the Lions try to lock up the NFC North title with a win Sunday over the Vikings in Minnesota. That’s all it will take, now or later, since the Lions will close out their regular season with another game against the Vikings on Jan. 7 at Ford Field. A win in Dallas next week also would do the trick for Dan Campbell’s team, and so would a Minnesota loss at home against Green Bay on New Year’s Eve, because the Lions’ magic number to win the divis…