[Polly] Update map passed to SCEVParameterReweriter.

The type of the map the SCEVParameterRewriter takes has been changed in
4635f6050b10.

Update the single use in polly to use SCEV* as type of the values.

GitOrigin-RevId: 762fbbe536996acf7175b551ce0e2c310165b135
1 file changed