The SGX device nodes have changed from /dev/sgx/[enclave|provision]
to /dev/sgx_[enclave|provision] in v4x RFC patches according to the
LKML feedback.
This changes moves to use the new device nodes. Backwards compatibility
is provided by adding /dev/sgx directory mount to containers. This
assumes the cluster admin has installed the udev rules provided in the
README to make the old device nodes as symlinks to the new device nodes.
Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>