knowndrives.cpp updates: Add Samsung S250 series.

Add '-v 198,increasing' to Samsung P80.
Replace '#if/#endif' by comment to fix configure option '--enable-drivedb'.


git-svn-id: https://smartmontools.svn.sourceforge.net/svnroot/smartmontools/trunk@2778 4ea69e1a-61f1-4043-bf83-b5c94c648137