docs/system/arm/xlnx-versal-virt: document ospi-flash property

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-id: 20241206192254.3889131-4-pierrick.bouvier@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

docs/system/arm/xlnx-versal-virt.rst

@@ -178,6 +178,9 @@ Run the following at the U-Boot prompt:
   fdt set /chosen/dom0 reg <0x00000000 0x40000000 0x0 0x03100000>
   booti 30000000 - 20000000
 
+It's possible to change the OSPI flash model emulated by using the machine model
+option ``ospi-flash``.
+
 BBRAM File Backend
 """"""""""""""""""
 BBRAM can have an optional file backend, which must be a seekable