Revert "nimble/ll: Fix encrypted data PDU payload length calculation"
Revert "nimble/ll: Fix encrypted data PDU payload length calculation"

This reverts commit c185dd6719b1cc9e08abada79e16e866118d3501.

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble