defconfig: msm: Disable CONFIG_CP_ACCESS64

Disable the cpaccess64 driver.
This driver allows user space access to cpu registers.
With this driver enabled, a CTS test causes the
system to crash.

CRs-Fixed: 968777
Change-Id: I3ebe7220c7ca68a25b781c2e836a735d11dcaf08
Signed-off-by: Bruce Levy <blevy@codeaurora.org>