defconfig: msm: Disable LLCC ECC support for sdm670

Due to security reasons, HLOS do not have access permissions
for LLCC ECC registers, so disable LLCC EDAC support for sdm670.

Change-Id: I4f8cb8cb07a9390c3591f78da09fcaa45a1c918a
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>