r8943

Revert of commit 8919: too many unwanted side-effects!
Rework of card timings for all readers
Rework init of internal readers
Removed all dirty fixups (like conax ecmpairing / T14 overclocked)
Try-fix ticket #3455
Cosmetic fix for DM7025 PLL reader
Fix for external readers, they need FI not F (tnx Ni Hao for reporting
/ testing)
Enabled fix for overclocked T14 again (tnx Homesite for reporting /
testing)