Marvell MVEBU SoC id and revision can be read out from any PCIe port
registers. This adds corresponding code to read out id and revision
and provides a helper function for drivers to use it.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Sebastian Hesselbarth