Reduce the amount of inlining of core Endpoint functions for XMEGA, to reduce the compiled code size (size/speed tradeoff).

git-svn-id: http://lufa-lib.googlecode.com/svn@2701 d5102386-fcda-11dd-9fdb-3debd5008f28
LUFA-IAR-Port: Merge in latest trunk.

git-svn-id: http://lufa-lib.googlecode.com/svn@2702 d5102386-fcda-11dd-9fdb-3debd5008f28
XMEGA-Demo-Ports: Merge in latest trunk.

git-svn-id: http://lufa-lib.googlecode.com/svn@2703 d5102386-fcda-11dd-9fdb-3debd5008f28