ataprint.cpp: add suggestion when 'Read Device Identity failed: xxx' error...

ataprint.cpp: add suggestion when 'Read Device Identity failed: xxx' error generated to look at --device-type=TYPE variants

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@5336 4ea69e1a-61f1-4043-bf83-b5c94c648137