docs: Fix a misdirected kerneldoc directive

The stratix10 service layer documentation tried to include a kerneldoc
comments for a nonexistent struct; leading to a "no structured comments
found" message.  Switch it to stratix10_svc_command_config_type, which
appears at that spot in the sequence and was not included.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/driver-api/firmware/other_interfaces.rst

@@ -33,7 +33,7 @@ of the requests on to a secure monitor (EL3).
    :functions: stratix10_svc_client_msg
 
 .. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
-   :functions: stratix10_svc_command_reconfig_payload
+   :functions: stratix10_svc_command_config_type
 
 .. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h
    :functions: stratix10_svc_cb_data