platform/x86: wmi: Update documentation regarding _WED

Update the WMI ACPI interface documentation to include the fact
that _WED should be evaluated every time an ACPI notification
is received.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20240219115919.16526-5-W_Armin@gmx.deReviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Documentation/wmi/acpi-interface.rst

@@ -93,4 +93,7 @@ _WED ACPI method
 ----------------
 
 Used to retrieve additional WMI event data, its single parameter is a integer
-holding the notification ID of the event.
+holding the notification ID of the event. This method should be evaluated every
+time an ACPI notification is received, since some ACPI implementations use a
+queue to store WMI event data items. This queue will overflow after a couple
+of WMI events are received without retrieving the associated WMI event data.