net: gem: Simplify return path in zynq_gem_recv

Remove one return from the code.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@ti.com>

drivers/net/zynq_gem.c

@@ -363,11 +363,9 @@ static int zynq_gem_recv(struct eth_device *dev)
 
 		if ((++priv->rxbd_current) >= RX_BUF)
 			priv->rxbd_current = 0;
-
-		return frame_len;
 	}
 
-	return 0;
+	return frame_len;
 }
 
 static void zynq_gem_halt(struct eth_device *dev)