u-boot : add fw_env.config

Add the fw_env.config file to SRC_URI to include it in the build
tree, and update it to point to /dev/mtd2 as 128k, which the
current flash layout.

Signed-off-by: Milton Miller <miltonm@us.ibm.com>
diff --git a/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/fw_env.config b/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/fw_env.config
index 9cb3ad2..fe09890 100644
--- a/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/fw_env.config
+++ b/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/fw_env.config
@@ -7,11 +7,12 @@
 
 # NOR example
 # MTD device name	Device offset	Env. size	Flash sector size	Number of sectors
-/dev/mtd1		0x0000		0x20000		0x20000
+#/dev/mtd1		0x0000		0x20000		0x20000
 #/dev/mtd2		0x0000		0x4000		0x4000
 
 # MTD SPI-dataflash example
 # MTD device name	Device offset	Env. size	Flash sector size	Number of sectors
+/dev/mtd2		0x00000		0x20000
 #/dev/mtd5		0x4200		0x4200
 #/dev/mtd6		0x4200		0x4200