commit 3bfd1300 upstream.

This device will be used in future Amazon EC2 instances as the primary
serial port (i.e., data sent to this port will be available via the
GetConsoleOuput [1] EC2 API).

[1] http://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_GetConsoleOutput.htmlSigned-off-by: Matt Wilson <msw@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>