Add support for an environment stored in the first partition of the
disk, which is assumed to hold a FAT filesystem.

Support the 'cat' command as it is useful for looking at extlinux.conf
files.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

(no changes since v1)

 configs/qemu-x86_64_defconfig | 6 ++++--
 configs/qemu-x86_defconfig    | 4 ++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/configs/qemu-x86_64_defconfig b/configs/qemu-x86_64_defconfig
index 84b7dc8e99f..ae34cc2a6f8 100644
--- a/configs/qemu-x86_64_defconfig
+++ b/configs/qemu-x86_64_defconfig
@@ -41,9 +41,7 @@ CONFIG_SPL_NO_BSS_LIMIT=y
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_SYS_MALLOC_SIMPLE=y
 CONFIG_SPL_CPU=y
-CONFIG_SPL_ENV_SUPPORT=y
 CONFIG_SPL_DM_SPI_FLASH=y
-CONFIG_SPL_NET=y
 CONFIG_SPL_PCI=y
 CONFIG_SPL_PCH=y
 CONFIG_SPL_RTC=y
@@ -54,6 +52,7 @@ CONFIG_CMD_MEM_SEARCH=y
 CONFIG_CMD_IDE=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_CAT=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_BOOTP_BOOTFILESIZE=y
 CONFIG_CMD_EFIDEBUG=y
@@ -61,6 +60,9 @@ CONFIG_CMD_TIME=y
 CONFIG_CMD_BOOTSTAGE=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_FAT_INTERFACE="virtio"
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_USE_BOOTFILE=y
 CONFIG_BOOTFILE="bzImage"
diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig
index d52afa42955..7afa3827e61 100644
--- a/configs/qemu-x86_defconfig
+++ b/configs/qemu-x86_defconfig
@@ -34,6 +34,7 @@ CONFIG_CMD_MEM_SEARCH=y
 CONFIG_CMD_IDE=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_CAT=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_BOOTP_BOOTFILESIZE=y
 CONFIG_CMD_EFIDEBUG=y
@@ -42,6 +43,9 @@ CONFIG_CMD_BOOTSTAGE=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_MAC_PARTITION=y
 CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_FAT_INTERFACE="virtio"
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_USE_BOOTFILE=y
 CONFIG_BOOTFILE="bzImage"
-- 
2.43.0