crypto: aead - Remove unused cryptoff parameter

This patch removes the cryptoff parameter now that all users
set it to zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/aead.c b/crypto/aead.c
index 070e4b9..7c3d725 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -106,10 +106,8 @@
 	if (req->old)
 		return crypt(req);
 
-	src = scatterwalk_ffwd(nreq->srcbuf, req->src,
-			       req->assoclen + req->cryptoff);
-	dst = scatterwalk_ffwd(nreq->dstbuf, req->dst,
-			       req->assoclen + req->cryptoff);
+	src = scatterwalk_ffwd(nreq->srcbuf, req->src, req->assoclen);
+	dst = scatterwalk_ffwd(nreq->dstbuf, req->dst, req->assoclen);
 
 	aead_request_set_tfm(&nreq->subreq, aead);
 	aead_request_set_callback(&nreq->subreq, aead_request_flags(req),