Indeed, the FAQ corrects the Sardakk N'orr ability text - the part about "during a Space Battle" are removed. Thus, the N'orr ability now works for ALL combat rolls, regardless of whether it's in space battle. A combat roll is anytime you roll a die and compare it to a unit's combat value, and that includes PDS fire.
So long story short, The N'orr DO get +1 to their PDS rolls.
Note that the same is true (in reverse) for the Jol-Nar, also; they get the -1 to ALL combat rolls, which also includes PDS.