defconfig: msm: Enable RRADC driver

Round robin ADC (RRADC) driver is used by clients to
read supported ADC channels on the PMI such as battery ID,
thermistors.

Change-Id: Ib82ffbe6e503cf7297c7951e45a4c55ff05eba66
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
2 files changed