ARM64: zynqmp: Add cortexa53 edac node

This patch adds edac node for arm cortexa53 to report
errors on L1 and L2 caches.

Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>