doc: update release notes

Update the DPDK 2.2 release notes with recent fixes:

  9db649 eal/linux: fix epoll timeout
  d49e0f hash: fix memory allocation of cuckoo key table
  7fcd13 ixgbe: fix X550 DCB
  5e73f4 ixgbe: remove burst size restriction of vector Rx
  7e01e3 i40e: fix base driver allocation when not using first numa node
  d53364 vhost: fix qemu shutdown

The order of sections (and inside) is inspired from MAINTAINERS file.

Signed-off-by: John McNamara <john.mcnamara@intel.com>
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>

doc/guides/rel_notes/release_2_2.rst

@@ -8,6 +8,54 @@ New Features
 Resolved Issues
 ---------------
 
+EAL
+~~~
+
+* **eal/linux: Fixed epoll timeout.**
+
+  Fixed issue where the ``rte_epoll_wait()`` function didn't return when the
+  underlying call to ``epoll_wait()`` timed out.
+
+
+Drivers
+~~~~~~~
+
+* **ixgbe: Fixed issue with X550 DCB.**
+
+  Fixed a DCB issue with x550 where for 8 TCs (Traffic Classes), if a packet
+  with user priority 6 or 7 was injected to the NIC, then the NIC would only
+  put 3 packets into the queue. There was also a similar issue for 4 TCs.
+
+* **ixgbe: Removed burst size restriction of vector RX.**
+
+  Fixed issue where a burst size less than 32 didn't receive anything.
+
+* **i40e: Fixed base driver allocation when not using first numa node.**
+
+  Fixed i40e issue that occurred when a DPDK application didn't initialize
+  ports if memory wasn't available on socket 0.
+
+* **vhost: Fixed Qemu shutdown.**
+
+  Fixed issue with libvirt ``virsh destroy`` not killing the VM.
+
+
+Libraries
+~~~~~~~~~
+
+* **hash: Fixed memory allocation of Cuckoo Hash key table.**
+
+  Fixed issue where an incorrect Cuckoo Hash key table size could be
+  calculated limiting the size to 4GB.
+
+
+Examples
+~~~~~~~~
+
+
+Other
+~~~~~
+
 
 Known Issues
 ------------