imx8mp: refine power on imx8mp board

VDD SOC normal run changed to 0.85V
LPDDR4 freq0 change from 4000MTS to 2400MTS

Signed-off-by: haidong.zheng <haidong.zheng@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/ddr/imx/imx8m/Kconfig b/drivers/ddr/imx/imx8m/Kconfig
index a5f5524..a90b7db 100644
--- a/drivers/ddr/imx/imx8m/Kconfig
+++ b/drivers/ddr/imx/imx8m/Kconfig
@@ -36,4 +36,12 @@
 	help
 	  Select this config if you want to use inline ecc feature for
 	  imx8mp-evk board.
+
+config IMX8M_VDD_SOC_850MV
+	bool "imx8mp change the vdd_soc voltage to 850mv"
+	depends on IMX8MP
+
+config IMX8M_LPDDR4_FREQ0_2400MTS
+	bool "imx8m PDDR4 freq0 change from 4000MTS to 2400MTS"
+
 endmenu