defconfig: msm: Enable ADC_TM driver

Threshold monitoring for VADC (ADC_TM) is used by
clients to configure and set thresholds on supported
VADC channels and receive notification once set
thresholds are crossed.

Change-Id: If1cfbee2d2fb19c5ace35d0a24e5e1a39f94aa50
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>