imx: mx7ulp_evk: enable mmc/regulator support

Enable MMC support.
The fsl sdhc driver needs regulator to enable power, so enable
regulator support.

And bootcmd and more env.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/configs/mx7ulp_evk_plugin_defconfig b/configs/mx7ulp_evk_plugin_defconfig
index 87a9324..d4c36d9 100644
--- a/configs/mx7ulp_evk_plugin_defconfig
+++ b/configs/mx7ulp_evk_plugin_defconfig
@@ -16,3 +16,11 @@
 CONFIG_PINCTRL_IMX7ULP=y
 CONFIG_DM_SERIAL=y
 CONFIG_FSL_LPUART=y
+CONFIG_CMD_MMC=y
+CONFIG_DM_MMC=y
+# CONFIG_DM_MMC_OPS is not set
+# CONFIG_BLK is not set
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_CMD_GPIO=y