Add device tree bindings and driver support for the cache error reporting devices on 8974. Remove leftover opportunistic debug info from the L1 error handler, since we can no longer get away with this on all targets. Change-Id: Iac88915a6b40a40ec3157027048f4daf6369dc42 Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>