scsi: isci: remote_node_context: Demote kernel-doc abuse

Fixes the following W=1 kernel build warning(s):

drivers/scsi/isci/remote_node_context.c:206: warning: Function parameter or member 'rnc' not described in 'sci_remote_node_context_notify_user'
drivers/scsi/isci/remote_node_context.c:206: warning: expecting prototype for This method just calls the user callback function and then resets the(). Prototype was for sci_remote_node_context_notify_user() instead

Link: https://lore.kernel.org/r/[e-mail]
Cc: Artur Paszkiewicz <[e-mail]>
Cc: "James E.J. Bottomley" <[e-mail]>
Cc: "Martin K. Petersen" <[e-mail]>
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/isci/remote_node_context.c

···
 	wake_up(&ihost->eventq);
 }
 
-/**
+/*
  * This method just calls the user callback function and then resets the
  * callback.
  */