CHICAGO — In terms of position and style, Guerschon Yabusele wasn’t a good fit on the Knicks, according to Mike Brown, who faced his former player for the first time in Sunday’s game against the Bulls. “The position he’s shown he’s best in in the NBA — the small-ball center spot — we just didn’t have the minutes consistently for him to be there,” Brown said before the Knicks’ 105-99 win over the Bulls . “And then when he was at the 4. For us, because of our centers, the matchups weren’t always