u-boot-aspeed: Add fw_env.config for eMMC

Create a fw_env.config for eMMC with a redundant environment
based on the mmc distro feature. The environment is located in
the first eMMC partition in the User Data area.

Change-Id: Icb25f88034a1acdc4548cbd5dbf7718c067935f2
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/recipes-bsp/u-boot/files/fw_env_ast2600_mmc.config b/recipes-bsp/u-boot/files/fw_env_ast2600_mmc.config
new file mode 100644
index 0000000..4c7937e
--- /dev/null
+++ b/recipes-bsp/u-boot/files/fw_env_ast2600_mmc.config
@@ -0,0 +1,3 @@
+# Device name	Device offset	Env. size
+/dev/mmcblk0p1	0x00000	        0x10000
+/dev/mmcblk0p1	0x10000	        0x10000