crypto: sun8i-ce - fix description of stat_fb

The description of stat_fb was wrong, let's fix it
Fixes: 06f751b6 ("crypto: allwinner - Add sun8i-ce Crypto Engine")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h

@@ -214,7 +214,7 @@ struct sun8i_cipher_tfm_ctx {
  *			this template
  * @alg:		one of sub struct must be used
  * @stat_req:		number of request done on this template
- * @stat_fb:		total of all data len done on this template
+ * @stat_fb:		number of request which has fallbacked
  */
 struct sun8i_ce_alg_template {
 	u32 type;