Revert "riscv: Select appropriate image type"

This reverts commit 027a316828528da95a77d20632370b1bc2823f0b as
discussed in [1].

[1] https://lists.denx.de/pipermail/u-boot/2025-May/590841.html

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
2 files changed