Convert to use DM_PMIC for the PFUZE3000. Since this PMIC is
under an I2C bus, conver to DM_I2C as well.

Also, since I2C is not used in SPL, remove CONFIG_SPL_I2C_SUPPORT
to avoid build warnings.
Signed-off-by: NFabio Estevam <festevam@gmail.com>
Acked-by: NOtavio Salvador <otavio@ossystems.com.br>