Merge r5610 into 6.5-7.3 drivedb.h branches.

Drop maintenance of 6.0-6.4 branches due to missing "DEFAULT" entry.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/branches/RELEASE_7_3_DRIVEDB@5611 4ea69e1a-61f1-4043-bf83-b5c94c648137