defconfig: msmcortex: Enable hardened user copy

Hardened user copy provides an extra layer of security checks when
copy_to_user/copy_from_user APIs are used to ensure data accesses are
valid. When invalid accesses are detected the kernel will forcibly
crash.

Change-Id: Ia0529c67da84017ea91a72427db008737d3c5dbd
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>