cymrln-palmpre: add coordinates calculation
cymrln-palmpre: add coordinates calculation

Signed-off-by: Thomas Zimmermann <b331fc67af2f8f62216dc7677e33fa9ad545b96d@vdm-design.de>

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