Mohamed Diawara was one of the more surprising Knicks revelations during the first half of the season.  But in the second half, that might change a bit.  His role could be diminished with the addition of Jeremy Sochan , whom the Knicks signed during the All-Star break after he was waived by the Spurs.  “I’m just gonna continue what I was doing,” Diawara told The Post before the Knicks lost to the Pistons, 126-111, on Thursday at the Garden . “Keep working and being ready for each opportunity