Adapt general ACC and SMM_ACC interfaces to the needs of OpenCL.
Add ACC-OpenCL backend.
Add SMM_ACC-OpenCL backend (a prototype for 23x23 matrices).


git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14364 bac0169d-1eea-4375-b5f6-f89d2ced9994