platform/x86: wmi: Update documentation regarding the GUID-based API

Warn WMI driver developers to not use GUID-based and non-GUID-based
functions for querying WMI data blocks and handling WMI events
simultaneously on the same device, as this will corrupt the WMI device
state and might thus lead to erratic behaviour.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20250216193251.866125-9-W_Armin@gmx.de
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Documentation/wmi/driver-development-guide.rst

@@ -96,6 +96,10 @@ on a given machine.
 Because of this, WMI drivers should use the state container design pattern as described in
 Documentation/driver-api/driver-model/design-patterns.rst.
 
+.. warning:: Using both GUID-based and non-GUID-based functions for querying WMI data blocks and
+             handling WMI events simultaneously on the same device is guaranteed to corrupt the
+             WMI device state and might lead to erratic behaviour.
+
 WMI method drivers
 ------------------