Trying to fix CUDA tsmm_inplace, re #243
Trying to fix CUDA tsmm_inplace, re #243

Moritz, please have a look at this!
Fixes phist tests, but not sure about the performance!
I do not really now what I'm doing here ;-).

RRZE-HPC/GHOST,RRZE-HPC/GHOST,RRZE-HPC/GHOST,RRZE-HPC/GHOST