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doc: migration-guide-4.2: Add note about Bluetooth HCI changes

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Mention the changes that have happened to the Bluetooth HCI driver
interface regarding packet type encoding.

Signed-off-by: Johan Hedberg <johan.hedberg@silabs.com>
This commit is contained in:
Johan Hedberg 2025-04-25 11:19:14 +03:00 • committed by Benjamin Cabé
commit bcd15caf65
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doc/releases/migration-guide-4.2.rst
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@ -272,6 +272,14 @@ Bluetooth Audio
* ``CONFIG_BT_CSIP_SET_MEMBER_NOTIFIABLE`` has been renamed to
:kconfig:option:`CONFIG_BT_CSIP_SET_MEMBER_SIRK_NOTIFIABLE``. (:github:`86763``)
Bluetooth HCI
=============
* The buffer types passing through the HCI driver interface are now indicated as H:4 encoded prefix
bytes as part of the buffer payload itself. The bt_buf_set_type() and bt_buf_get_type() functions
have been deprecated, but are still usable, with the exception that they can only be
called once per buffer.
Bluetooth Host
==============