In DT case, PBAIS registers are programmed via regulator,
use regulator APIs to control PBIAS.
Signed-off-by: NBalaji T K <balajitk@ti.com>
Tested-by: NFlorian Vaussard <florian.vaussard@epfl.ch>
Tested-by: NStefan Roese <sr@denx.de>
Signed-off-by: NChris Ball <chris@printf.net>