crypto: omap-sham - initialize req only after omap_sham_hw_init()

Let's only initialize dd->req after omap_sham_hw_init() in case of
errors.

Looks like leaving dd->req initialized on omap_sham_hw_init() errors is
is not causing issues though as we return on errors. So this patch can be
applied as clean-up.

Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Tero Kristo <kristo@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/omap-sham.c

@@ -1093,12 +1093,12 @@ static int omap_sham_hash_one_req(struct crypto_engine *engine, void *areq)
 	dev_dbg(dd->dev, "hash-one: op: %u, total: %u, digcnt: %zd, final: %d",
 		ctx->op, ctx->total, ctx->digcnt, final);
 
-	dd->req = req;
-
 	err = omap_sham_hw_init(dd);
 	if (err)
 		return err;
 
+	dd->req = req;
+
 	if (ctx->digcnt)
 		dd->pdata->copy_hash(req, 0);