With upstream commit ae2d9506a36c ("riscv: sifive: Rename fu540 board to unleashed")
in U-Boot v2021.07 release, the defconfig for SiFive Unleashed board
has been changed to sifive_unleashed_defconfig.
Also newer U-Boot has deprecated the usage of SPL_FIT_GENERATOR
to generate u-boot.itb hence there is no 'u-boot.itb' target in
the U-Boot Makefile anymore. Instead binman is used to assemble
the u-boot.itb image.
We will need to switch to BR2_TARGET_UBOOT_FORMAT_CUSTOM for
installing u-boot.itb.
Switch over to use the latest U-Boot v2023.04 release.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
