crypto: header - Fix spelling errors

Fix some spelling mistakes in comments:
cipherntext ==> ciphertext
syncronise ==> synchronise
feeded ==> fed

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

include/crypto/hash.h

@@ -458,7 +458,7 @@ int crypto_ahash_finup(struct ahash_request *req);
  *
  * Return:
  * 0		if the message digest was successfully calculated;
- * -EINPROGRESS	if data is feeded into hardware (DMA) or queued for later;
+ * -EINPROGRESS	if data is fed into hardware (DMA) or queued for later;
  * -EBUSY	if queue is full and request should be resubmitted later;
  * other < 0	if an error occurred
  */