staging: lustre: Replace "to to" with "to"

This patch replace "to to" with "to".
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/cl_object.h

@@ -1833,7 +1833,7 @@ struct cl_io {
 	 */
 			     ci_verify_layout:1,
 	/**
-	 * file is released, restore has to to be triggered by vvp layer
+	 * file is released, restore has to be triggered by vvp layer
 	 */
 			     ci_restore_needed:1,
 	/**