doc: add note to emphasize the need to use --windows for WaaG
Add a note to the "Device Model Parameters" document to emphasize
the need to use the '--windows' parameter to use Windows-as-a-Guest
(WaaG), else Windows will not recognize the virtual disk it has
been assigned.
@@ -456,6 +456,10 @@ Here are descriptions for each of these ``acrn-dm`` command line parameters:
--windows
+ .. note::
+ This option is mandatory for running Windows in a User VM. If it is
+ not used, Windows will not recognize the virtual disk.
+
----
``--psram``
