arm: armada: configs: Move environment location for mvebu

Move the default environment location to the end of 4MB flash
region. This change allows to accomodate larger flash boot
images making space for forthcoming code changes.

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/configs/mvebu_db_armada8k_defconfig b/configs/mvebu_db_armada8k_defconfig
index 5d8a1b6..ffe8e02 100644
--- a/configs/mvebu_db_armada8k_defconfig
+++ b/configs/mvebu_db_armada8k_defconfig
@@ -6,7 +6,7 @@
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_TARGET_MVEBU_ARMADA_8K=y
 CONFIG_ENV_SIZE=0x10000
-CONFIG_ENV_OFFSET=0x180000
+CONFIG_ENV_OFFSET=0x3f0000
 CONFIG_ENV_SECT_SIZE=0x10000
 CONFIG_DEBUG_UART_BASE=0xf0512000
 CONFIG_DEBUG_UART_CLOCK=200000000