crypto: ixp4xx - Add missing npe_c release in error branches

Most error branches following the call to npe_request contain a call to
npe_request. This patch add a call to npe_release to error branches
following the call to npe_request that do not have it.

This issue was found with Hector.

Signed-off-by: Quentin Lambert <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/ixp4xx_crypto.c

···
 	if (!npe_running(npe_c)) {
 		ret = npe_load_firmware(npe_c, npe_name(npe_c), dev);
 		if (ret)
-			return ret;
+			goto npe_release;
 		if (npe_recv_message(npe_c, msg, "STATUS_MSG"))
 			goto npe_error;
 	} else {
···
 	default:
 		printk(KERN_ERR "Firmware of %s lacks crypto support\n",
 			npe_name(npe_c));
-		return -ENODEV;
+		ret = -ENODEV;
+		goto npe_release;
 	}
 	/* buffer_pool will also be used to sometimes store the hmac,
 	 * so assure it is large enough
···
 err:
 	dma_pool_destroy(ctx_pool);
 	dma_pool_destroy(buffer_pool);
+npe_release:
 	npe_release(npe_c);
 	return ret;
 }