Refactor: controller: Static-ize controld-matrix.h global variables

Fine as long as controld_fsa.c is the only file that includes
controld_matrix.h. Also rename crmd_fsa_state to crmd_fsa_next_state to
avoid confusion with enum crmd_fsa_state.

Ref T239

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>