MM readback the currently active crosslets info, instead of the initial MM...

MM readback the currently active crosslets info, instead of the initial MM written crosslets_info_reg.

Closes L2SDP-562

requested review from @walle

assigned to @kooistra

added 3 commits

• 622f16cc...ec777942 - 2 commits from branch master
• edbdd587 - Merge branch 'master' into L2SDP-562

Compare with previous version

merged

mentioned in commit 08247af4