ti: Default to ENV_IS_IN_FAT if MMC_OMAP_HS

When we have MMC available we assume that we want to put the env as a
file on FAT.

Cc: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am335x_boneblack_defconfig b/configs/am335x_boneblack_defconfig
index 516ad70..ae2adb7 100644
--- a/configs/am335x_boneblack_defconfig
+++ b/configs/am335x_boneblack_defconfig
@@ -6,6 +6,7 @@
 CONFIG_SPL_STACK_R_ADDR=0x82000000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SYS_EXTRA_OPTIONS="EMMC_BOOT"
+# CONFIG_ENV_IS_IN_FAT is not set
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y