hwmon: qpnp-adc-current: log the compensation coefficients

The compensation coefficients are used to execute performance tests.
Provide this information in the debug logs of the IADC driver.

Change-Id: I59df9501d8edf652c6cf0999a17cc820115b07cc
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>