staging: lustre: Replace "dont" with "don't"

Replace "dont" with "don't".
"Dont" is not same as "Do not" or "Don't".
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/fld/fld_cache.c

@@ -263,7 +263,7 @@ static void fld_cache_punch_hole(struct fld_cache *cache,
 	fldt = kzalloc(sizeof(*fldt), GFP_ATOMIC);
 	if (!fldt) {
 		kfree(f_new);
-		/* overlap is not allowed, so dont mess up list. */
+		/* overlap is not allowed, so don't mess up list. */
 		return;
 	}
 	/*  break f_curr RANGE into three RANGES: