aspeed: add support for the witherspoon-bmc board

The Witherspoon boards are OpenPOWER system hosting POWER9 Processors.
Add support for their BMC including a couple of I2C devices as found
on real HW.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Message-id: 20180530064049.27976-3-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
1 file changed