power: regulator: replace some debug() by dev_dbg()

Replace some debug() by dev_dbg() when dev variable
is available/valid.

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>
1 file changed