crypto: use ERR_CAST

Replace PTR_ERR followed by ERR_PTR by ERR_CAST, to be more concise.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression err,x;
@@
-       err = PTR_ERR(x);
        if (IS_ERR(x))
-                return ERR_PTR(err);
+                return ERR_CAST(x);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --cc crypto/aead.c
Simple merge

diff --cc crypto/algapi.c
Simple merge

diff --cc crypto/authenc.c
Simple merge

diff --cc crypto/authencesn.c
Simple merge

diff --cc crypto/blkcipher.c
Simple merge

diff --cc crypto/ccm.c
Simple merge

diff --cc crypto/chainiv.c
Simple merge

diff --cc crypto/ctr.c
Simple merge

diff --cc crypto/cts.c
Simple merge

diff --cc crypto/gcm.c
Simple merge

diff --cc crypto/seqiv.c
Simple merge