hwmon: qpnp-adc: Add debug information

Add IADC gain, offset and rsense information for debug.
Also add VADC reference channel debug information.

Change-Id: Ice81d8ce8d4b725b3e5cbef33159a3bdd69dd621
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
2 files changed