fix(cpus): workaround for Neoverse N2 erratum 2743014

Neoverse N2 erratum 2743014 is a Cat B erratum that applies to
all revisions <=r0p2 and is fixed in r0p3. The workaround is to
set CPUACTLR5_EL1[56:55] to 2'b01.

SDEN documentation:
https://developer.arm.com/documentation/SDEN1982442/latest

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: Ie7e1be5dea9d1f74738f9fed0fb58bfd41763192
6 files changed