doc: release: 4.3: add UVC changes

Add USB UVC device's new uvc_add_format() function to the release note,
and document the semantic changes of UVC APIs in the migration guide.

Signed-off-by: Josuah Demangeon <me@josuah.net>

Author: josuah

doc/releases/migration-guide-4.3.rst

@@ -156,6 +156,12 @@ Stepper
 
 * :dtcompatible:`zephyr,gpio-stepper` has been replaced by :dtcompatible:`zephyr,h-bridge-stepper`.
 
+USB
+===
+
+* The USB Video Class was configuring the framerate and format of the source video device.
+  This is now to be done by the application after the host selected the format (:github:`93192`).
+
 .. zephyr-keep-sorted-stop
 
 Bluetooth

doc/releases/release-notes-4.3.rst

@@ -303,6 +303,12 @@ New APIs and options
 
   * :c:macro:`__deprecated_version`
 
+* USB
+
+  * Video
+
+    * :c:func:`uvc_add_format`
+
 * Video
 
   * :c:member:`video_format.size` field