defconfig: msm: Enable PAN emulation

Privilege Access Never (PAN) enforces the usage of
copy_to_user/copy_from_user and friends when kernel accesses data from
user space. If user space memory is accessed outside of these functions
a kernel panic occurs.

Change-Id: Iacd5b3b2e1fd97487a4cd13ec96cb3508717d5fb
Signed-off-by: Ramakrishna Gottimukkula <rgottimu@codeaurora.org>