riscv: jump_label: Batch icache maintenance

Switch to the batched version of the jump label update functions so
instruction cache maintenance is deferred until the end of the update.

Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20240327160520.791322-2-samuel.holland@sifive.com


Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>