doc: releases: migration-guide-4.0: add note about disk-name for SD/MMC

SD and MMC devices now require the disk-name property. Add a note to the
migration guide so that users know the recommended value to add for this
name for each disk driver type.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

doc/releases/migration-guide-4.0.rst

@@ -208,6 +208,22 @@ Crypto
 Display
 =======
 
+Disk
+====
+
+* The SDMMC subsystem driver now requires a ``disk-name`` property be supplied
+  with the definition of the disk, which is used when registering the
+  SD device with the disk subsystem. This permits multiple SD devices to be
+  registered simultaneously. If unsure, ``disk-name = "SD"`` may be used
+  as a sane default.
+
+* The MMC subsystem driver now requires a ``disk-name`` property be supplied
+  with the definition of the disk, which is used when registering the
+  MMC device with the disk subsystem. This permits multiple MMC devices to be
+  registered simultaneously. If unsure, ``disk-name = "SD2"`` may be used
+  as a sane default.
+
+
 Enhanced Serial Peripheral Interface (eSPI)
 ===========================================