ARM: meson: enable FIT with LEGACY_IMAGE_FORMAT on all configs

Allow all boards to boot with a fitImage, but keep support for
Legacy image format for now.

Link: https://lore.kernel.org/r/20231023-usb-dfu-boot-v1-1-df9d121c67c1@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/configs/sei510_defconfig b/configs/sei510_defconfig
index 63e4ebe..e3e1b15 100644
--- a/configs/sei510_defconfig
+++ b/configs/sei510_defconfig
@@ -21,6 +21,10 @@
 CONFIG_SYS_LOAD_ADDR=0x1000000
 CONFIG_DEBUG_UART=y
 CONFIG_REMAKE_ELF=y
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_USE_PREBOOT=y
 CONFIG_PREBOOT="run load_logo"