As requested, heres the sam.h although there is nothing special about it:
#ifndef _SAM_
#define _SAM_
#if defined(__SAME51G19A__) || defined(__ATSAME51G19A__)
#include "same51g19a.h"
#elif defined(__SAME51G18A__) || defined(__ATSAME51G18A__)
#include "same51g18a.h"
#elif defined(__SAME51N20A__) || defined(__ATSAME51N20A__)
#include "same51n20a.h"
#elif defined(__SAME51N19A__) || defined(__ATSAME51N19A__)
#include "same51n19a.h"
#elif defined(__SAME51J19A__) || defined(__ATSAME51J19A__)
#include "same51j19a.h"
#elif defined(__SAME51J18A__) || defined(__ATSAME51J18A__)
#include "same51j18a.h"
#elif defined(__SAME51J20A__) || defined(__ATSAME51J20A__)
#include "same51j20a.h"
#else
#error Library does not support the specified device
#endif
#endif /* _SAM_ */