mm: cache-pl310-erp: Add support for PL310 Error Reporting

PL310 is an external L2 Cache controller which reports
any errors such as decode on master/slave, read/write
parity errors on data/tag RAM using the L2CC interrupt
connected to the processor.
Once we receive interrupt we can read the status register
to determine the type of error occurred.

Change-Id: I66957d4bbd67a11b2bffbf919cf5aa177b5d2ebc
Signed-off-by: Taniya Das <tdas@codeaurora.org>