defconfig: msm: Disable devmem, devport support for sdm670

Disable DEVMEM and DEVPORT on sdm670 as secure policies requires
this node to not be accessible to userspace.

Change-Id: I9eb6699b78046977e579aff2dc168a4a23d881b4
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
2 files changed