defconfig: msm8960: Enable cache error reporting

Enable cache error reporting in the defconfig, and
configure the kernel to panic if unrecoverable errors are
encountered. Panic the kernel when recoverable errors are
encountered in the debug configuration.

Change-Id: I193bbe64589cfe8a57b7ec4d58c1771f188b844a
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>