arm: mvebu: Espressobin: Define fdt_addr and kernel_addr env aliases

Boot scripts for existing Espressobin Linux distributions, like OpenWRT,
expect that U-Boot set fdt_addr and kernel_addr envs. So add env aliases
from fdt_addr_r and kernel_addr_r values.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Andre Heider <a.heider@gmail.com>
diff --git a/include/configs/mvebu_armada-37xx.h b/include/configs/mvebu_armada-37xx.h
index 93c05e3..905ce09 100644
--- a/include/configs/mvebu_armada-37xx.h
+++ b/include/configs/mvebu_armada-37xx.h
@@ -90,10 +90,13 @@
 
 #include <config_distro_bootcmd.h>
 
+/* fdt_addr and kernel_addr are needed for existing distribution boot scripts */
 #define CONFIG_EXTRA_ENV_SETTINGS	\
 	"scriptaddr=0x6d00000\0"	\
 	"pxefile_addr_r=0x6e00000\0"	\
+	"fdt_addr=0x6f00000\0"		\
 	"fdt_addr_r=0x6f00000\0"	\
+	"kernel_addr=0x7000000\0"	\
 	"kernel_addr_r=0x7000000\0"	\
 	"ramdisk_addr_r=0xa000000\0"	\
 	BOOTENV