ARM: 8886/1: l2x0: support parity-enable/disable on aurora

The aurora cache on the Marvell Armada-XP SoC supports the same tag
parity features as the other l2x0 cache implementations.

[jlu@pengutronix.de: use aurora specific define AURORA_ACR_PARITY_EN]

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>