Fix L2 error processing to look into interrupts in each L2 and slice. Enable L2 error interrupts. Bug 1549451 Change-Id: If6dd77f1333426a10b6a148c9432c12df8d879c7 Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: http://git-master/r/494656 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Deepak Nibade <dnibade@nvidia.com>