Add support for new HPE serial device.  It is MSI enabled,
but otherwise similar to legacy HP server serial devices.
Tested-by: NJerry Hoemann <jerry.hoemann@hpe.com>
Signed-off-by: NRandy Wright <rwright@hpe.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1621009614-28836-1-git-send-email-rwright@hpe.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>