The NBA’s Christmas Day schedule just got twice as exciting with the addition of two more games to the opening day of the shortened 2011-12 season.The Oklahoma City Thunder will host the Orlando Magic while the Los Angeles Clippers will visit the Golden State Warriors on Dec. 25, joining the other marquee matchups.The Boston Celtics will visit the New York Knicks, the Los Angeles Lakers host the Chicago Bulls, and the Miami Heat come to Texas to face the Dallas Mavericks in an NBA Finals rematch.The rest of the revised 66-game schedule will debut in the TV special this coming Tuesday.