Add support for SCT Error Recovery Timer features added in ACS-4 (#1427).

'-l scterc[,R,W],p' option gets/sets the persistent power-on values.
'-l scterc,r' option restores to the manufacturer's default values.

Patch by Jeremy Bauer.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@5166 4ea69e1a-61f1-4043-bf83-b5c94c648137