omap3_logic: Fix Environmental location

For the omap3_logic boards, the environment is always in NAND.
This removes the ENV_IS_IN_FAT flag to eliminate the extra chatter.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/omap3_logic_defconfig b/configs/omap3_logic_defconfig
index 008e1db..c3e999e 100644
--- a/configs/omap3_logic_defconfig
+++ b/configs/omap3_logic_defconfig
@@ -30,6 +30,7 @@
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_SPL_OF_PLATDATA=y
+# CONFIG_ENV_IS_IN_FAT is not set
 CONFIG_ENV_IS_IN_NAND=y
 # CONFIG_BLK is not set
 CONFIG_DM_I2C=y