For customed BD71840 on i.mx8mm-evk board, LDO1/LDO2 setting is different as BD71837, and no LDOx_SEL for LDO3/4. Correct LDO1_VOLT_SEL/ LDO1_VOLT_SEL and remove unused LDO enable code in probe, since those can be done by 'regulator-boot-on'/'regulator-always-on' in dts. Signed-off-by: Robin Gong <yibin.gong@nxp.com>