clocksource: fix Marvell timer read-back value ...

Clocksource read callback expects incrementing timer values, while
internal timer on Marvell SoCs counts backwards. Fix value returned
by Marvell MVEBU and Orion clocksource drivers.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arm: initial support for Marvell Armada 370/XP SoCs ...

This commit adds minimal support for the Armada 370 and Armada XP SoCs
from Marvell.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>