feat(cpus): add pabandon support to the Alto cpu

Alto supports powerdown abandon. That support has flown under the radar
so add it in the same way as other pabandon CPUs.

Change-Id: I15f9e8cd77bf5aa23df8e548eb3d35d5c1f4eb2d
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
1 file changed