This patch series extracts out code for unloading the initramfs that was identical across 14 architectures, and moves those architectures to the common code path. Additionally, RISC-V is newly moved to the common code path. In addition to reducing duplication, this allows us to bring future improvements (such as generalizing existing "keep initrd" command line options) to multiple architectures at once. v2: Mark generic free_initrd_mem __init.
