net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)

This is a driver for the ENA family of networking devices.

Signed-off-by: Netanel Belgazal <netanel@annapurnalabs.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/Documentation/networking/00-INDEX b/Documentation/networking/00-INDEX
index 415154a..a7697783 100644
--- a/Documentation/networking/00-INDEX
+++ b/Documentation/networking/00-INDEX
@@ -74,6 +74,8 @@
 	- The DNS resolver module allows kernel servies to make DNS queries.
 driver.txt
 	- Softnet driver issues.
+ena.txt
+	- info on Amazon's Elastic Network Adapter (ENA)
 e100.txt
 	- info on Intel's EtherExpress PRO/100 line of 10/100 boards
 e1000.txt