forked from Mirrors/opensbi

Instead of directly calling sbi_ipi_send_many(), we introduce sbi_ipi_send_halt() for halting a set of HARTs. This way in future we can assign any IPI event number for HART halting within sbi_ipi.c only. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>