README: update for 3.14 kernels

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>

README.md

-# qcacld-2.0
\ No newline at end of file
+qcacld-2.0
+==========
+
+Boundary Devices changes to [CodeAurora qcacld-2.0 repository][codeaurora].
+
+3.14.x kernel
+-------------
+
+For a 3.14.x kernel, please use the following branch:
+* [boundary-LNX.LEH.4.2.2.2-4.5.20.034][branch-3.14.x]
+
+[codeaurora]: https://source.codeaurora.org/quic/la/platform/vendor/qcom-opensource/wlan/qcacld-2.0/ "CodeAurora qcacld-2.0"
+[branch-3.14.x]: https://github.com/boundarydevices/qcacld-2.0/tree/boundary-LNX.LEH.4.2.2.2-4.5.20.034 "Boundary LNX.LEH.4.2.2.2 v4.5.20.034"