3.1 Errata Section in Data Sheet is no Longer Valid

A clarification for the Errata section in the device data sheet has been made.

The errata content has been moved to a separate document, ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/PSilicon Errata and Data Sheet Clarification (this document).

See the Silicon Errata Issues section of this document for the latest errata.