Note: this section shouldn't actually be updated in #8357, but
rather in #8358 which is the wrapup related to cipher and AEADs
accelaration. As a consequence we start the AEAD section with
a disclaimer explaining that the information written there will
be updated soon by a follow up PR.
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>