ARM: 8885/1: aurora-l2: add defines for parity and ECC registers

These defines will be used by subsequent patches to add support for the
parity check and error correction functionality in the Aurora L2 cache
controller.

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