configs: dragonboard410c: Save environment data on eMMC

Save the environment data at the end of the boot partition on emmc

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
diff --git a/configs/dragonboard410c_defconfig b/configs/dragonboard410c_defconfig
index a85aa74..4c04544 100644
--- a/configs/dragonboard410c_defconfig
+++ b/configs/dragonboard410c_defconfig
@@ -43,3 +43,5 @@
 CONFIG_USB_ETHER_MCS7830=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_OF_LIBFDT_OVERLAY=y
+CONFIG_OF_CONTROL=y
+CONFIG_ENV_IS_IN_MMC=y