ena: 2.5.0 -> 2.7.1

This update is supposed to give us support for the 5.17 kernel according to the
2.7.0 release notes here: https://github.com/amzn/amzn-drivers/releases/tag/ena_linux_2.7.0

Unfortunately, in practice, it does not build with `linuxPackages_5_17`,
so I left that marked as broken.

It does work for 5.15 though, so we can use that, woo!

pkgs/os-specific/linux/ena/default.nix

@@ -1,14 +1,14 @@
 { lib, stdenv, fetchFromGitHub, kernel }:
 
 stdenv.mkDerivation rec {
-  version = "2.5.0";
+  version = "2.7.1";
   name = "ena-${version}-${kernel.version}";
 
   src = fetchFromGitHub {
     owner = "amzn";
     repo = "amzn-drivers";
     rev = "ena_linux_${version}";
-    sha256 = "sha256-uOf/1624UtjaZtrk7XyQpeUGdTNVDnzZJZMgU86i+SM=";
+    sha256 = "sha256-JkGzmmsAmLvL9e+bg58H79GNHgsqydK/79VoWEq5/Mc=";
   };
 
   hardeningDisable = [ "pic" ];
@@ -42,6 +42,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Only;
     maintainers = [ maintainers.eelco ];
     platforms = platforms.linux;
-    broken = kernel.kernelAtLeast "5.15";
+    broken = kernel.kernelAtLeast "5.17";
   };
 }