hwmon: qpnp-adc: Remove exporting qpnp_vadc_configure api

qpnp_vadc_configure() api should be a static function and
used only by the qpnp vadc driver. Remove exporting it to
avoid clients using it directly.

Change-Id: I8ccc9b286a76be5dcad21c11bce57f2c59d286e5
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
2 files changed