Revert "reboot or power-off stage kernel will panic because NPE remove the code avoid kernel panic"

This reverts commit 74fa754.

Change-Id: Ib1883bf6af6a286a6b4f300bfb475a1cfac96056
Reviewed-on: https://tp-biosrd-v02/gerrit/80608
Reviewed-by: Alex Cheng(鄭富元) <Alex_Cheng@asus.com>
Tested-by: Alex Cheng(鄭富元) <Alex_Cheng@asus.com>

Author: alex3788

drivers/mmc/host/dw_mmc-rockchip.c

@@ -289,6 +289,17 @@ static int dw_mci_rockchip_probe(struct platform_device *pdev)
 
 static void dw_mci_rockchip_platfm_shutdown(struct platform_device *pdev)
 {
+	struct dw_mci *host = platform_get_drvdata(pdev);
+	struct mmc_host *mmc = host->cur_slot->mmc;
+	int ret;
+
+	mdelay(20);
+
+	if (!IS_ERR(mmc->supply.vmmc))
+		ret = regulator_enable(mmc->supply.vmmc);
+
+	if (!IS_ERR(mmc->supply.vqmmc))
+		regulator_set_voltage(mmc->supply.vqmmc, 3000000, 3300000);
 }
 
 #ifdef CONFIG_PM_SLEEP