defconfig: trinket: Enable PAN emulation on Trinket

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: Ifd6284de52e28a6950ad785d9e75f23acb039a50
Signed-off-by: Ramakrishna Gottimukkula <rgottimu@codeaurora.org>