fix(cpus): workaround for Cortex-A720 erratum 2792132

Cortex-A720 erratum 2792132 is a Cat B erratum that is present
in revision r0p0, r0p1 and is fixed in r0p2.

The workaround is to set bit[26] of the CPUACTLR2_EL1 to 1.

SDEN documentation:
https://developer.arm.com/documentation/SDEN2439421/latest

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: I8d11fe65a2ab5f79244cc3395d0645f77256304c
3 files changed