crypto: atmel-sha - Removed unused variable "err"

Removed unused variable "err" and directly return "0"

Reported by coccicheck -
./drivers/crypto/atmel-sha.c:758:5-8: Unneeded variable: "err". Return "0" on line 766
Signed-off-by: Rahul Pathak <rpathak@visteon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/atmel-sha.c

@@ -755,7 +755,6 @@ static int atmel_sha_finish(struct ahash_request *req)
 {
 	struct atmel_sha_reqctx *ctx = ahash_request_ctx(req);
 	struct atmel_sha_dev *dd = ctx->dd;
-	int err = 0;
 
 	if (ctx->digcnt[0] || ctx->digcnt[1])
 		atmel_sha_copy_ready_hash(req);
@@ -763,7 +762,7 @@ static int atmel_sha_finish(struct ahash_request *req)
 	dev_dbg(dd->dev, "digcnt: 0x%llx 0x%llx, bufcnt: %d\n", ctx->digcnt[1],
 		ctx->digcnt[0], ctx->bufcnt);
 
-	return err;
+	return 0;
 }
 
 static void atmel_sha_finish_req(struct ahash_request *req, int err)