configs: mediatek: enable boot via extlinux

Enable FAT and SYSBOOT to use extlinux boot script

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Signed-off-by: Julien STEPHAN <jstephan@baylibre.com>
diff --git a/configs/mt8183_pumpkin_defconfig b/configs/mt8183_pumpkin_defconfig
index 88f7234..49d12bf 100644
--- a/configs/mt8183_pumpkin_defconfig
+++ b/configs/mt8183_pumpkin_defconfig
@@ -48,8 +48,11 @@
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SETEXPR is not set
 # CONFIG_CMD_BLOCK_CACHE is not set
+CONFIG_CMD_SYSBOOT=y
 CONFIG_CMD_EXT4=y
+CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+# CONFIG_DOS_PARTITION is not set
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_MMC_ENV_PART=2
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y