staging: comedi: Add a missing space

Add a missing space so that the * is properly aligned with
the rest of the block comment. Problem found with checkpatch.
Signed-off-by: NEisha Chen-yen-su <chenyensu0@gmail.com>
Acked-by: NJulia Lawall <julia.lawall@lip6.fr>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/ni_stc.h

@@ -9,7 +9,7 @@
 /*
  * References:
  *   DAQ-STC Technical Reference Manual
-*/
+ */
 
 #ifndef _COMEDI_NI_STC_H
 #define _COMEDI_NI_STC_H