add support for xc7a50tfgg484-1

[wuxx]

Hello, I am reverse-engineering a module based on xc7a50tfgg484-1. (https://twitter.com/Claude1079/status/1410292944121249795/photo/2) At present, I found a compilation error, and the report is missing ~/opt/f4pga/xc7/share/f4pga/arch/xc7a50t_test/xc7a50tfgg484-1/pinmap.csv, can we add support for this chip?, or guide me how to solve the problem