exa2pro/starpu-max: porting work to Maxeler DFE @ 2e02972ba39668f10e062b2bb5745d623fb785a4

Cédric Augonnet 0984a29d6c Partially revert commit 1750: starpu_tag_declare_deps _is_ a public function.		16 lat temu
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strassen2.c	0984a29d6c Partially revert commit 1750: starpu_tag_declare_deps _is_ a public function.	16 lat temu
strassen2_kernels.c	da923646ea Rename the "blas" interface into "matrix" which is much clearer.	16 lat temu