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Convert the board to use DM_PMIC instead of the legacy SPL I2C/PMIC handling. Changes include: - Enable DM_PMIC, DM_PMIC_PCA9450, and SPL_DM_PMIC_PCA9450 in defconfig. - Drop legacy SPL I2C and PMIC options. - Remove manual I2C1 pad setup and legacy power_pca9450_init() usage. - Use DM-based pmic_get() with the DT node "pmic@25". - Update PMIC register programming to use struct udevice API. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Yannic Moog <y.moog@phytec.de> Tested-by: Yannic Moog <y.moog@phytec.de> Reviewed-by: Teresa Remmet <t.remmet@phytec.de>