bfloat16 data type not defined in openblas-0.3.10

[susilehtola]

As reported in
https://bugzilla.redhat.com/show_bug.cgi?id=1873667

compilation of a program on x86_64 that includes openblas/f77blas.h fails with

In file included from blksdp.h:41,
                 from bwblkslv.c:45:
/usr/include/openblas/f77blas.h:476:5: error: unknown type name ‘bfloat16’; did you mean ‘_Float16’?
  476 |     bfloat16 *, blasint *, bfloat16 *, blasint *, float *, float *, blasint *);
      |     ^~~~~~~~
      |     _Float16

Indeed, the file f77blas.h installed by openblas-0.3.10 has the following declaration

/* Level 3 routines */

void BLASFUNC(shgemm)(char *, char *, blasint *, blasint *, blasint *, float *,
           bfloat16 *, blasint *, bfloat16 *, blasint *, float *, float *, blasint *);
void BLASFUNC(sgemm)(char *, char *, blasint *, blasint *, blasint *, float *,
           float  *, blasint *, float  *, blasint *, float  *, float  *, blasint *);
void BLASFUNC(dgemm)(char *, char *, blasint *, blasint *, blasint *, double *,
           double *, blasint *, double *, blasint *, double *, double *, blasint *);

[martin-frbg]

#2783 believed to be fixed by #2784