mod_devicetable: fix kdocs for ishtp_device_id

The kdocs were copied from another device_id struct and not adapted.

Fixes: fa443bc3 ("HID: intel-ish-hid: add support for MODULE_DEVICE_TABLE()")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

include/linux/mod_devicetable.h

@@ -901,8 +901,7 @@ struct dfl_device_id {
 
 /**
  * struct ishtp_device_id - ISHTP device identifier
- * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
- * @context: pointer to driver specific data
+ * @guid: GUID of the device.
  */
 struct ishtp_device_id {
 	guid_t guid;