defconfig: msm: Enable ADC5 peripheral driver

ADC5 peripheral supports clients to read ADC channels.
Clients include reading vph_pwr and on board system
thermistors.

Change-Id: Id2f1a39e3e259dba06483b477aed75614c576588
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>