UBI: fix spelling of detach in debug output

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com>
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index acec85d..fb55678 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -1026,7 +1026,7 @@
 	{
 		int ubi_num;
 
-		dbg_gen("dettach MTD device");
+		dbg_gen("detach MTD device");
 		err = get_user(ubi_num, (__user int32_t *)argp);
 		if (err) {
 			err = -EFAULT;