Install ethtool test and run it as a ptest.
(From OE-Core rev: 6b70373923909a05bb4d99beb8105c732ee0b2de)
Signed-off-by: Gabriel Barbu <gabriel.barbu@enea.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>