Revert "config/reader: Use HEX key parsing for ins7e and ins7e11 settings."

This reverts commit r8222.

It turns out that ins7E filled only with zeroes is a valid ins and
r8222 broke this functionality.

This fixes ticket #3112.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8244 4b0bc96b-bc66-0410-9d44-ebda105a78c1