cy8mrln-palmpre: new way of interpolating the position
cy8mrln-palmpre: new way of interpolating the position

* substract half of maximum pressure from all surrounding fields

Signed-off-by: Thomas Zimmermann <999b84d59b6016724cab926cb0c26e91bb140045@vdm-design.de>

kergoth/tslib,lin2724/tslib,kobolabs/tslib,kobolabs/tslib,kergoth/tslib,kobolabs/tslib,etmatrix/tslib,etmatrix/tslib,jaretcantu/tslib,folkien/tslib,vpeter4/tslib,leighmurray/tslib,vpeter4/tslib,jaretcantu/tslib,kergoth/tslib,lin2724/tslib,leighmurray/tslib,pssc/tslib,kergoth/tslib,pssc/tslib,etmatrix/tslib,pssc/tslib,folkien/tslib