[nrf fromtree] doc: release: Note changes to flash_mspi_nor

Note that read, write and control commands can be configured
separately via devicetree now.

Signed-off-by: Utsav Munendra <[email protected]>
(cherry picked from commit 3b09b09)
Signed-off-by: Aleksandr Khromykh <[email protected]>

Author: utsavm9

doc/releases/release-notes-4.4.rst

@@ -64,6 +64,10 @@ New APIs and options
 
 .. zephyr-keep-sorted-start re(^\* \w)
 
+* Flash
+
+  * :dtcompatible:`jedec,mspi-nor` now allows MSPI configuration of read, write and
+    control commands separately via devicetree.
 
 .. zephyr-keep-sorted-stop