Add flexibility to dispersion output routine


git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@13811 bac0169d-1eea-4375-b5f6-f89d2ced9994
LRIGPW forces

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@13812 bac0169d-1eea-4375-b5f6-f89d2ced9994