Submodule
This MR introduces the lpgbt-fpga submodule in the SL project, from which it takes all the lpgbt-fpga related files, which have been therefore removed from the SL FPGA firmware project.
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This MR introduces the lpgbt-fpga submodule in the SL project, from which it takes all the lpgbt-fpga related files, which have been therefore removed from the SL FPGA firmware project.