imx: imx8mm-beacon: Move Environment to eMMC partition 2

The downstream U-Boot distributed by Beacon stores the environment
in the eMMC and the end of partition 2.  This allow the environment
to stay on the SOM regardless of the boot source.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/configs/imx8mm_beacon_defconfig b/configs/imx8mm_beacon_defconfig
index cfb0eea..737f578 100644
--- a/configs/imx8mm_beacon_defconfig
+++ b/configs/imx8mm_beacon_defconfig
@@ -5,8 +5,8 @@
 CONFIG_SPL_GPIO=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
-CONFIG_ENV_SIZE=0x1000
-CONFIG_ENV_OFFSET=0x400000
+CONFIG_ENV_SIZE=0x2000
+CONFIG_ENV_OFFSET=0xFFFFDE00
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="imx8mm-beacon-kit"
 CONFIG_SPL_TEXT_BASE=0x7E1000
@@ -76,7 +76,8 @@
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
-CONFIG_SYS_MMC_ENV_DEV=1
+CONFIG_SYS_MMC_ENV_DEV=2
+CONFIG_SYS_MMC_ENV_PART=2
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_USE_ETHPRIME=y
 CONFIG_ETHPRIME="FEC"