fvConstraints::limitPressure: Added support for maxFactor and minFactor when p has calculated BCs

When limiting the pressure in p_rgh based solvers p typically has calculated BCs
which are now supported when calculating the max and min pressure from maxFactor
and minFactor.

src/fvConstraints/limitPressure/limitPressure.C

@@ -71,7 +71,11 @@ void Foam::fv::limitPressure::readCoeffs()
 
         forAll(pbf, patchi)
         {
-            if (pbf[patchi].fixesValue())
+            if
+            (
+                pbf[patchi].fixesValue()
+             || isA<calculatedFvPatchField<scalar>>(pbf[patchi])
+            )
             {
                 pLimits = true;