To ease debugging, use dev_err() instead of dev_dbg() for alerting when regulator has nonunique value. Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com> Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>